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P1395 — Wheel Speed Sensor 2, G-Sensor Circuit

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Code

P1395

BUICK P — Powertrain

Wheel Speed Sensor 2, G-Sensor Circuit

Brand: BUICK
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P1395

CADILLAC P — Powertrain

Wheel Speed Sensor 2, G-Sensor Circuit

Brand: CADILLAC
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

206

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Code

P1395

CHEVROLET P — Powertrain

Wheel Speed Sensor 2, G-Sensor Circuit

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

456

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Code

P1395

CHRYSLER P — Powertrain

Wheel Speed Sensor 2, G-Sensor Circuit

Brand: CHRYSLER
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

193

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Code

P1395

FORD P — Powertrain

Glow Plug Monitor Fault Bank 1

Brand: FORD
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

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Code

P1395

GM P — Powertrain

Wheel Speed Sensor 2 G-Sensor Circuit

Brand: GM
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

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Code

P1395

GMC P — Powertrain

Wheel Speed Sensor 2 G-Sensor Circuit

Brand: GMC
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

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Code

P1395

HUMMER P — Powertrain

Wheel Speed Sensor 2 - G - Sensor Circuit

Brand: HUMMER
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

Repair manuals

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138

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Code

P1395

LAND ROVER P — Powertrain

Brightness (bank 1)

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

320

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Code

P1395

LINCOLN P — Powertrain

Glow Plug Monitor Fault Bank 1

Brand: LINCOLN
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

166

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Code

P1395

MERCURY P — Powertrain

Glow Plug Monitor Fault Bank 1

Brand: MERCURY
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

296

Browse 296 MERCURY manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

P1395

OLDSMOBILE P — Powertrain

Wheel Speed Sensor 2 G-Sensor Circuit

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

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Code

P1395

Other P — Powertrain

Glow Plug Monitor Fault (Bank #1)

Brand: Other
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

9,287

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Code

P1395

SATURN P — Powertrain

Wheel Speed Sensor 2 G-Sensor Circuit

Brand: SATURN
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

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Code

P1395

VOLKSWAGEN P — Powertrain

Ignition Coil Power Output Stage 3 Malfunction

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed wheel speed sensor (Sensor 2)
  • Damaged, chafed, corroded or disconnected wiring/connector at the sensor
  • Broken or contaminated tone/wheel reluctor ring (missing or damaged teeth)
  • Short to power or ground in the sensor harness
  • Poor ground or reference voltage to the sensor
  • Failed ABS/traction control module or internal sensor interface

Symptoms

  • ABS, Traction Control, or Stability Control warning lamp illuminated
  • Intermittent or no ABS operation; traction control may be disabled
  • Possible ABS pump or solenoid engagement faults during braking
  • Erratic speed readings to ABS/TC systems (may not affect dash speedometer)
  • Possible transmission shifting irregularities if vehicle uses wheel speed for shift logic

What to check

  • Read and record all stored codes and freeze frame with a capable scan tool
  • Visually inspect sensor 2, connector and harness for damage, corrosion, or contamination
  • Inspect tone/reluctor ring for missing or damaged teeth and for debris
  • Check connector pins for corrosion, bent pins or water intrusion; clean and reseal if needed
  • Back-probe harness and check for proper reference voltage, ground, and signal with ignition on
  • Measure sensor resistance (if VR type) and compare to spec; check for short to ground/power

Signal parameters

  • Variable Reluctance (VR) sensors: DC resistance typically ~200–2000 ohms (varies by model) and produce an AC waveform whose peak-to-peak voltage increases with speed (commonly 0.2–4 Vpp at low speeds).
  • Hall-effect sensors: square-wave 0–5 V (or 0–12 V in some systems) pulse with frequency proportional to wheel speed; require a 5 V (or vehicle reference) supply and ground.
  • G-type or MEMS lateral/longitudinal sensors (if used): nominal center voltage ~2.5 V at rest with ± voltage change proportional to g-force; expect stable bias voltage and response to movement.
  • Signal frequency increases linearly with wheel speed; loss of pulses or stuck voltage indicates sensor or wiring fault.
  • Actual values vary by model year and sensor type—consult vehicle-specific specs.

Diagnostic algorithm

  1. Connect a scan tool, read all codes and freeze frame data. Note vehicle speed, wheel speeds, and module reported sensor values.
  2. Perform visual inspection of sensor 2, harness, connector and tone ring. Repair any obvious damage or contamination.
  3. With ignition ON (engine off), back-probe the sensor connector: verify reference voltage (if hall type), continuity to ground, and sensor supply. If no reference, trace to ABS/BCM power and grounds.
  4. Measure sensor resistance (with connector disconnected) and compare to spec. If open/shorted, replace sensor.
  5. Spin the wheel by hand or raise vehicle and rotate wheel while monitoring signal with oscilloscope or multimeter: verify AC waveform for VR or square wave for Hall sensor. Look for missing pulses or irregular waveform.
  6. Wiggle harness and connector while observing live data or waveform to find intermittent faults.
  7. Check tone/reluctor ring for damaged or missing teeth and ensure proper sensor air gap. Repair or replace as needed.
  8. If sensor and harness check good, perform continuity and short-to-power/ground tests from sensor connector to ABS module connector. Repair any wiring faults.
  9. If wiring and sensor are good, suspect ABS/traction control module input stage. Consider swapping channels (if supported) or testing module per manufacturer procedures. Replace module only after isolating fault.
  10. After repairs, clear codes, perform relearns/calibrations required by manufacturer, and road test to confirm repair.

Likely causes

  • Corroded or loose connector at wheel speed sensor
  • Damaged sensor wiring (pinched, frayed, rubbed through)
  • Failed wheel speed sensor 2 (common on vehicles with exposed sensors)
  • Tone ring damaged or covered with debris/metal shavings

Fault status

⚠️ Status
Wheel Speed Sensor 2 (G-sensor) circuit fault detected. ABS/traction control may be disabled. Inspect sensor, wiring, connectors, tone ring, and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

626

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