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Home / DTC / P1732 — Rear speed snsr input sig low

P1732 — Rear speed snsr input sig low

Detailed page for trouble code P1732.

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Code

P1732

DAEWOO P — Powertrain

Rear speed snsr input sig low

Brand: DAEWOO
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted sensor wiring (to ground or power)
  • Corroded/loose connector or poor pin contact
  • Failed rear wheel speed sensor (Hall or magnetic)
  • Damaged or missing tone ring/reluctor on the wheel/hub
  • Grounding issue or loss of reference power to the sensor
  • Faulty ABS/BCM/ECM input circuit or internal module fault

Symptoms

  • ABS warning lamp illuminated
  • Traction control/ESP warning lamp may be on or disabled
  • Reduced or erratic ABS/traction control performance
  • Speedometer or cruise control issues (in some vehicles)
  • Diagnostic trouble code P1732 stored in memory

What to check

  • Scan for additional ABS/vehicle speed codes and view freeze-frame/live data
  • Visually inspect sensor, connector and wiring at the affected rear wheel for damage, corrosion or contamination
  • Check tone ring/reluctor for missing/magnetized teeth, cracks, heavy rust or metal shavings
  • Wiggle wiring harness while monitoring live sensor data or codes to reproduce fault
  • Measure sensor connector voltages with key on (reference power and ground) and with wheel rotated (signal)
  • Check continuity and resistance of sensor wiring back to the control module (check for shorts to ground or battery)

Signal parameters

  • Typical passive (variable reluctance) sensor: DC resistance usually ~600–2000 Ω (manufacturer-specific); AC output increases with wheel speed — small mV at very low speed to several volts AC at higher speeds
  • Typical active (Hall) sensor: 5 V reference supply, signal is a square wave 0–5 V (some systems use 12 V); digital frequency increases with wheel speed
  • At rest: signal typically ~0 V (no AC) for passive, stable reference level for active sensors
  • Low-signal condition: signal amplitude below module detection threshold (e.g., near 0 V AC for passive or stuck low for active)
  • Frequency range: 0 Hz (stationary) up to several hundred Hz depending on wheel speed and gear ratio — verify against vehicle spec

Diagnostic algorithm

  1. Retrieve codes and live data, note which rear sensor (left or right) is affected and any related codes.
  2. Perform a visual inspection of the affected wheel sensor, connector and tone ring. Repair or replace obviously damaged components.
  3. With ignition ON (engine off), probe connector: verify sensor reference voltage (if active) and ground continuity. If no reference, trace/repair power supply or ground.
  4. For passive sensors measure DC resistance across sensor terminals; compare to spec. For active sensors check reference voltage and pull-up. Replace sensor if out of spec.
  5. Spin the wheel by hand (or safely raise vehicle and spin wheel) while monitoring signal with a DVOM (AC mV for passive) or oscilloscope (recommended). Look for clean pulses and increasing amplitude/frequency. If no signal or very low amplitude, suspect sensor, tone ring or wiring.
  6. If sensor output at the wheel is good but module still shows low signal, back-probe at the control module connector and verify signal arrival. If good at wheel but lost at module, inspect wiring continuity and repair shorts/opens.
  7. Repair or replace the faulty sensor, wiring, connector or tone ring as required. After repairs clear codes and road-test to confirm the fault does not return and that live-data signals are within expected ranges.
  8. If all hardware and wiring checks good, consider diagnosing the ABS/BCM input circuit or replacing the control module per manufacturer procedure.

Likely causes

  • Corroded/loose connector at the rear speed sensor
  • Failed rear wheel speed sensor
  • Broken/shorted signal wire between sensor and control module
  • Damaged or missing tone ring on hub or axle

Fault status

⚠️ Status
Rear speed sensor input signal low — the control module is detecting a low or missing signal from a rear wheel speed sensor. Check sensor, wiring, connector, tone ring and module input circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0500 P0502 P0503 P0720 C0035
Repair manuals

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Code

P1732

FORD P — Powertrain

2-3 Shift Malfunction

Brand: FORD
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted sensor wiring (to ground or power)
  • Corroded/loose connector or poor pin contact
  • Failed rear wheel speed sensor (Hall or magnetic)
  • Damaged or missing tone ring/reluctor on the wheel/hub
  • Grounding issue or loss of reference power to the sensor
  • Faulty ABS/BCM/ECM input circuit or internal module fault

Symptoms

  • ABS warning lamp illuminated
  • Traction control/ESP warning lamp may be on or disabled
  • Reduced or erratic ABS/traction control performance
  • Speedometer or cruise control issues (in some vehicles)
  • Diagnostic trouble code P1732 stored in memory

What to check

  • Scan for additional ABS/vehicle speed codes and view freeze-frame/live data
  • Visually inspect sensor, connector and wiring at the affected rear wheel for damage, corrosion or contamination
  • Check tone ring/reluctor for missing/magnetized teeth, cracks, heavy rust or metal shavings
  • Wiggle wiring harness while monitoring live sensor data or codes to reproduce fault
  • Measure sensor connector voltages with key on (reference power and ground) and with wheel rotated (signal)
  • Check continuity and resistance of sensor wiring back to the control module (check for shorts to ground or battery)

Signal parameters

  • Typical passive (variable reluctance) sensor: DC resistance usually ~600–2000 Ω (manufacturer-specific); AC output increases with wheel speed — small mV at very low speed to several volts AC at higher speeds
  • Typical active (Hall) sensor: 5 V reference supply, signal is a square wave 0–5 V (some systems use 12 V); digital frequency increases with wheel speed
  • At rest: signal typically ~0 V (no AC) for passive, stable reference level for active sensors
  • Low-signal condition: signal amplitude below module detection threshold (e.g., near 0 V AC for passive or stuck low for active)
  • Frequency range: 0 Hz (stationary) up to several hundred Hz depending on wheel speed and gear ratio — verify against vehicle spec

Diagnostic algorithm

  1. Retrieve codes and live data, note which rear sensor (left or right) is affected and any related codes.
  2. Perform a visual inspection of the affected wheel sensor, connector and tone ring. Repair or replace obviously damaged components.
  3. With ignition ON (engine off), probe connector: verify sensor reference voltage (if active) and ground continuity. If no reference, trace/repair power supply or ground.
  4. For passive sensors measure DC resistance across sensor terminals; compare to spec. For active sensors check reference voltage and pull-up. Replace sensor if out of spec.
  5. Spin the wheel by hand (or safely raise vehicle and spin wheel) while monitoring signal with a DVOM (AC mV for passive) or oscilloscope (recommended). Look for clean pulses and increasing amplitude/frequency. If no signal or very low amplitude, suspect sensor, tone ring or wiring.
  6. If sensor output at the wheel is good but module still shows low signal, back-probe at the control module connector and verify signal arrival. If good at wheel but lost at module, inspect wiring continuity and repair shorts/opens.
  7. Repair or replace the faulty sensor, wiring, connector or tone ring as required. After repairs clear codes and road-test to confirm the fault does not return and that live-data signals are within expected ranges.
  8. If all hardware and wiring checks good, consider diagnosing the ABS/BCM input circuit or replacing the control module per manufacturer procedure.

Likely causes

  • Corroded/loose connector at the rear speed sensor
  • Failed rear wheel speed sensor
  • Broken/shorted signal wire between sensor and control module
  • Damaged or missing tone ring on hub or axle

Fault status

⚠️ Status
Rear speed sensor input signal low — the control module is detecting a low or missing signal from a rear wheel speed sensor. Check sensor, wiring, connector, tone ring and module input circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0500 P0502 P0503 P0720 C0035
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Code

P1732

LAND ROVER P — Powertrain

2 - 3 Malfunction of the transmission

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted sensor wiring (to ground or power)
  • Corroded/loose connector or poor pin contact
  • Failed rear wheel speed sensor (Hall or magnetic)
  • Damaged or missing tone ring/reluctor on the wheel/hub
  • Grounding issue or loss of reference power to the sensor
  • Faulty ABS/BCM/ECM input circuit or internal module fault

Symptoms

  • ABS warning lamp illuminated
  • Traction control/ESP warning lamp may be on or disabled
  • Reduced or erratic ABS/traction control performance
  • Speedometer or cruise control issues (in some vehicles)
  • Diagnostic trouble code P1732 stored in memory

What to check

  • Scan for additional ABS/vehicle speed codes and view freeze-frame/live data
  • Visually inspect sensor, connector and wiring at the affected rear wheel for damage, corrosion or contamination
  • Check tone ring/reluctor for missing/magnetized teeth, cracks, heavy rust or metal shavings
  • Wiggle wiring harness while monitoring live sensor data or codes to reproduce fault
  • Measure sensor connector voltages with key on (reference power and ground) and with wheel rotated (signal)
  • Check continuity and resistance of sensor wiring back to the control module (check for shorts to ground or battery)

Signal parameters

  • Typical passive (variable reluctance) sensor: DC resistance usually ~600–2000 Ω (manufacturer-specific); AC output increases with wheel speed — small mV at very low speed to several volts AC at higher speeds
  • Typical active (Hall) sensor: 5 V reference supply, signal is a square wave 0–5 V (some systems use 12 V); digital frequency increases with wheel speed
  • At rest: signal typically ~0 V (no AC) for passive, stable reference level for active sensors
  • Low-signal condition: signal amplitude below module detection threshold (e.g., near 0 V AC for passive or stuck low for active)
  • Frequency range: 0 Hz (stationary) up to several hundred Hz depending on wheel speed and gear ratio — verify against vehicle spec

Diagnostic algorithm

  1. Retrieve codes and live data, note which rear sensor (left or right) is affected and any related codes.
  2. Perform a visual inspection of the affected wheel sensor, connector and tone ring. Repair or replace obviously damaged components.
  3. With ignition ON (engine off), probe connector: verify sensor reference voltage (if active) and ground continuity. If no reference, trace/repair power supply or ground.
  4. For passive sensors measure DC resistance across sensor terminals; compare to spec. For active sensors check reference voltage and pull-up. Replace sensor if out of spec.
  5. Spin the wheel by hand (or safely raise vehicle and spin wheel) while monitoring signal with a DVOM (AC mV for passive) or oscilloscope (recommended). Look for clean pulses and increasing amplitude/frequency. If no signal or very low amplitude, suspect sensor, tone ring or wiring.
  6. If sensor output at the wheel is good but module still shows low signal, back-probe at the control module connector and verify signal arrival. If good at wheel but lost at module, inspect wiring continuity and repair shorts/opens.
  7. Repair or replace the faulty sensor, wiring, connector or tone ring as required. After repairs clear codes and road-test to confirm the fault does not return and that live-data signals are within expected ranges.
  8. If all hardware and wiring checks good, consider diagnosing the ABS/BCM input circuit or replacing the control module per manufacturer procedure.

Likely causes

  • Corroded/loose connector at the rear speed sensor
  • Failed rear wheel speed sensor
  • Broken/shorted signal wire between sensor and control module
  • Damaged or missing tone ring on hub or axle

Fault status

⚠️ Status
Rear speed sensor input signal low — the control module is detecting a low or missing signal from a rear wheel speed sensor. Check sensor, wiring, connector, tone ring and module input circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0500 P0502 P0503 P0720 C0035
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

P1732

LINCOLN P — Powertrain

2-3 Shift Malfunction

Brand: LINCOLN
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted sensor wiring (to ground or power)
  • Corroded/loose connector or poor pin contact
  • Failed rear wheel speed sensor (Hall or magnetic)
  • Damaged or missing tone ring/reluctor on the wheel/hub
  • Grounding issue or loss of reference power to the sensor
  • Faulty ABS/BCM/ECM input circuit or internal module fault

Symptoms

  • ABS warning lamp illuminated
  • Traction control/ESP warning lamp may be on or disabled
  • Reduced or erratic ABS/traction control performance
  • Speedometer or cruise control issues (in some vehicles)
  • Diagnostic trouble code P1732 stored in memory

What to check

  • Scan for additional ABS/vehicle speed codes and view freeze-frame/live data
  • Visually inspect sensor, connector and wiring at the affected rear wheel for damage, corrosion or contamination
  • Check tone ring/reluctor for missing/magnetized teeth, cracks, heavy rust or metal shavings
  • Wiggle wiring harness while monitoring live sensor data or codes to reproduce fault
  • Measure sensor connector voltages with key on (reference power and ground) and with wheel rotated (signal)
  • Check continuity and resistance of sensor wiring back to the control module (check for shorts to ground or battery)

Signal parameters

  • Typical passive (variable reluctance) sensor: DC resistance usually ~600–2000 Ω (manufacturer-specific); AC output increases with wheel speed — small mV at very low speed to several volts AC at higher speeds
  • Typical active (Hall) sensor: 5 V reference supply, signal is a square wave 0–5 V (some systems use 12 V); digital frequency increases with wheel speed
  • At rest: signal typically ~0 V (no AC) for passive, stable reference level for active sensors
  • Low-signal condition: signal amplitude below module detection threshold (e.g., near 0 V AC for passive or stuck low for active)
  • Frequency range: 0 Hz (stationary) up to several hundred Hz depending on wheel speed and gear ratio — verify against vehicle spec

Diagnostic algorithm

  1. Retrieve codes and live data, note which rear sensor (left or right) is affected and any related codes.
  2. Perform a visual inspection of the affected wheel sensor, connector and tone ring. Repair or replace obviously damaged components.
  3. With ignition ON (engine off), probe connector: verify sensor reference voltage (if active) and ground continuity. If no reference, trace/repair power supply or ground.
  4. For passive sensors measure DC resistance across sensor terminals; compare to spec. For active sensors check reference voltage and pull-up. Replace sensor if out of spec.
  5. Spin the wheel by hand (or safely raise vehicle and spin wheel) while monitoring signal with a DVOM (AC mV for passive) or oscilloscope (recommended). Look for clean pulses and increasing amplitude/frequency. If no signal or very low amplitude, suspect sensor, tone ring or wiring.
  6. If sensor output at the wheel is good but module still shows low signal, back-probe at the control module connector and verify signal arrival. If good at wheel but lost at module, inspect wiring continuity and repair shorts/opens.
  7. Repair or replace the faulty sensor, wiring, connector or tone ring as required. After repairs clear codes and road-test to confirm the fault does not return and that live-data signals are within expected ranges.
  8. If all hardware and wiring checks good, consider diagnosing the ABS/BCM input circuit or replacing the control module per manufacturer procedure.

Likely causes

  • Corroded/loose connector at the rear speed sensor
  • Failed rear wheel speed sensor
  • Broken/shorted signal wire between sensor and control module
  • Damaged or missing tone ring on hub or axle

Fault status

⚠️ Status
Rear speed sensor input signal low — the control module is detecting a low or missing signal from a rear wheel speed sensor. Check sensor, wiring, connector, tone ring and module input circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0500 P0502 P0503 P0720 C0035
166

Browse 166 LINCOLN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LINCOLN

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Code

P1732

MERCURY P — Powertrain

2-3 Shift Malfunction

Brand: MERCURY
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted sensor wiring (to ground or power)
  • Corroded/loose connector or poor pin contact
  • Failed rear wheel speed sensor (Hall or magnetic)
  • Damaged or missing tone ring/reluctor on the wheel/hub
  • Grounding issue or loss of reference power to the sensor
  • Faulty ABS/BCM/ECM input circuit or internal module fault

Symptoms

  • ABS warning lamp illuminated
  • Traction control/ESP warning lamp may be on or disabled
  • Reduced or erratic ABS/traction control performance
  • Speedometer or cruise control issues (in some vehicles)
  • Diagnostic trouble code P1732 stored in memory

What to check

  • Scan for additional ABS/vehicle speed codes and view freeze-frame/live data
  • Visually inspect sensor, connector and wiring at the affected rear wheel for damage, corrosion or contamination
  • Check tone ring/reluctor for missing/magnetized teeth, cracks, heavy rust or metal shavings
  • Wiggle wiring harness while monitoring live sensor data or codes to reproduce fault
  • Measure sensor connector voltages with key on (reference power and ground) and with wheel rotated (signal)
  • Check continuity and resistance of sensor wiring back to the control module (check for shorts to ground or battery)

Signal parameters

  • Typical passive (variable reluctance) sensor: DC resistance usually ~600–2000 Ω (manufacturer-specific); AC output increases with wheel speed — small mV at very low speed to several volts AC at higher speeds
  • Typical active (Hall) sensor: 5 V reference supply, signal is a square wave 0–5 V (some systems use 12 V); digital frequency increases with wheel speed
  • At rest: signal typically ~0 V (no AC) for passive, stable reference level for active sensors
  • Low-signal condition: signal amplitude below module detection threshold (e.g., near 0 V AC for passive or stuck low for active)
  • Frequency range: 0 Hz (stationary) up to several hundred Hz depending on wheel speed and gear ratio — verify against vehicle spec

Diagnostic algorithm

  1. Retrieve codes and live data, note which rear sensor (left or right) is affected and any related codes.
  2. Perform a visual inspection of the affected wheel sensor, connector and tone ring. Repair or replace obviously damaged components.
  3. With ignition ON (engine off), probe connector: verify sensor reference voltage (if active) and ground continuity. If no reference, trace/repair power supply or ground.
  4. For passive sensors measure DC resistance across sensor terminals; compare to spec. For active sensors check reference voltage and pull-up. Replace sensor if out of spec.
  5. Spin the wheel by hand (or safely raise vehicle and spin wheel) while monitoring signal with a DVOM (AC mV for passive) or oscilloscope (recommended). Look for clean pulses and increasing amplitude/frequency. If no signal or very low amplitude, suspect sensor, tone ring or wiring.
  6. If sensor output at the wheel is good but module still shows low signal, back-probe at the control module connector and verify signal arrival. If good at wheel but lost at module, inspect wiring continuity and repair shorts/opens.
  7. Repair or replace the faulty sensor, wiring, connector or tone ring as required. After repairs clear codes and road-test to confirm the fault does not return and that live-data signals are within expected ranges.
  8. If all hardware and wiring checks good, consider diagnosing the ABS/BCM input circuit or replacing the control module per manufacturer procedure.

Likely causes

  • Corroded/loose connector at the rear speed sensor
  • Failed rear wheel speed sensor
  • Broken/shorted signal wire between sensor and control module
  • Damaged or missing tone ring on hub or axle

Fault status

⚠️ Status
Rear speed sensor input signal low — the control module is detecting a low or missing signal from a rear wheel speed sensor. Check sensor, wiring, connector, tone ring and module input circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0500 P0502 P0503 P0720 C0035
296

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

MERCURY

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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Code

P1732

MITSUBISHI P — Powertrain

Line pressure sensor open

Brand: MITSUBISHI
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted sensor wiring (to ground or power)
  • Corroded/loose connector or poor pin contact
  • Failed rear wheel speed sensor (Hall or magnetic)
  • Damaged or missing tone ring/reluctor on the wheel/hub
  • Grounding issue or loss of reference power to the sensor
  • Faulty ABS/BCM/ECM input circuit or internal module fault

Symptoms

  • ABS warning lamp illuminated
  • Traction control/ESP warning lamp may be on or disabled
  • Reduced or erratic ABS/traction control performance
  • Speedometer or cruise control issues (in some vehicles)
  • Diagnostic trouble code P1732 stored in memory

What to check

  • Scan for additional ABS/vehicle speed codes and view freeze-frame/live data
  • Visually inspect sensor, connector and wiring at the affected rear wheel for damage, corrosion or contamination
  • Check tone ring/reluctor for missing/magnetized teeth, cracks, heavy rust or metal shavings
  • Wiggle wiring harness while monitoring live sensor data or codes to reproduce fault
  • Measure sensor connector voltages with key on (reference power and ground) and with wheel rotated (signal)
  • Check continuity and resistance of sensor wiring back to the control module (check for shorts to ground or battery)

Signal parameters

  • Typical passive (variable reluctance) sensor: DC resistance usually ~600–2000 Ω (manufacturer-specific); AC output increases with wheel speed — small mV at very low speed to several volts AC at higher speeds
  • Typical active (Hall) sensor: 5 V reference supply, signal is a square wave 0–5 V (some systems use 12 V); digital frequency increases with wheel speed
  • At rest: signal typically ~0 V (no AC) for passive, stable reference level for active sensors
  • Low-signal condition: signal amplitude below module detection threshold (e.g., near 0 V AC for passive or stuck low for active)
  • Frequency range: 0 Hz (stationary) up to several hundred Hz depending on wheel speed and gear ratio — verify against vehicle spec

Diagnostic algorithm

  1. Retrieve codes and live data, note which rear sensor (left or right) is affected and any related codes.
  2. Perform a visual inspection of the affected wheel sensor, connector and tone ring. Repair or replace obviously damaged components.
  3. With ignition ON (engine off), probe connector: verify sensor reference voltage (if active) and ground continuity. If no reference, trace/repair power supply or ground.
  4. For passive sensors measure DC resistance across sensor terminals; compare to spec. For active sensors check reference voltage and pull-up. Replace sensor if out of spec.
  5. Spin the wheel by hand (or safely raise vehicle and spin wheel) while monitoring signal with a DVOM (AC mV for passive) or oscilloscope (recommended). Look for clean pulses and increasing amplitude/frequency. If no signal or very low amplitude, suspect sensor, tone ring or wiring.
  6. If sensor output at the wheel is good but module still shows low signal, back-probe at the control module connector and verify signal arrival. If good at wheel but lost at module, inspect wiring continuity and repair shorts/opens.
  7. Repair or replace the faulty sensor, wiring, connector or tone ring as required. After repairs clear codes and road-test to confirm the fault does not return and that live-data signals are within expected ranges.
  8. If all hardware and wiring checks good, consider diagnosing the ABS/BCM input circuit or replacing the control module per manufacturer procedure.

Likely causes

  • Corroded/loose connector at the rear speed sensor
  • Failed rear wheel speed sensor
  • Broken/shorted signal wire between sensor and control module
  • Damaged or missing tone ring on hub or axle

Fault status

⚠️ Status
Rear speed sensor input signal low — the control module is detecting a low or missing signal from a rear wheel speed sensor. Check sensor, wiring, connector, tone ring and module input circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0500 P0502 P0503 P0720 C0035
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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Code

P1732

Other P — Powertrain

2-3 Shift Malfunction

Brand: Other
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted sensor wiring (to ground or power)
  • Corroded/loose connector or poor pin contact
  • Failed rear wheel speed sensor (Hall or magnetic)
  • Damaged or missing tone ring/reluctor on the wheel/hub
  • Grounding issue or loss of reference power to the sensor
  • Faulty ABS/BCM/ECM input circuit or internal module fault

Symptoms

  • ABS warning lamp illuminated
  • Traction control/ESP warning lamp may be on or disabled
  • Reduced or erratic ABS/traction control performance
  • Speedometer or cruise control issues (in some vehicles)
  • Diagnostic trouble code P1732 stored in memory

What to check

  • Scan for additional ABS/vehicle speed codes and view freeze-frame/live data
  • Visually inspect sensor, connector and wiring at the affected rear wheel for damage, corrosion or contamination
  • Check tone ring/reluctor for missing/magnetized teeth, cracks, heavy rust or metal shavings
  • Wiggle wiring harness while monitoring live sensor data or codes to reproduce fault
  • Measure sensor connector voltages with key on (reference power and ground) and with wheel rotated (signal)
  • Check continuity and resistance of sensor wiring back to the control module (check for shorts to ground or battery)

Signal parameters

  • Typical passive (variable reluctance) sensor: DC resistance usually ~600–2000 Ω (manufacturer-specific); AC output increases with wheel speed — small mV at very low speed to several volts AC at higher speeds
  • Typical active (Hall) sensor: 5 V reference supply, signal is a square wave 0–5 V (some systems use 12 V); digital frequency increases with wheel speed
  • At rest: signal typically ~0 V (no AC) for passive, stable reference level for active sensors
  • Low-signal condition: signal amplitude below module detection threshold (e.g., near 0 V AC for passive or stuck low for active)
  • Frequency range: 0 Hz (stationary) up to several hundred Hz depending on wheel speed and gear ratio — verify against vehicle spec

Diagnostic algorithm

  1. Retrieve codes and live data, note which rear sensor (left or right) is affected and any related codes.
  2. Perform a visual inspection of the affected wheel sensor, connector and tone ring. Repair or replace obviously damaged components.
  3. With ignition ON (engine off), probe connector: verify sensor reference voltage (if active) and ground continuity. If no reference, trace/repair power supply or ground.
  4. For passive sensors measure DC resistance across sensor terminals; compare to spec. For active sensors check reference voltage and pull-up. Replace sensor if out of spec.
  5. Spin the wheel by hand (or safely raise vehicle and spin wheel) while monitoring signal with a DVOM (AC mV for passive) or oscilloscope (recommended). Look for clean pulses and increasing amplitude/frequency. If no signal or very low amplitude, suspect sensor, tone ring or wiring.
  6. If sensor output at the wheel is good but module still shows low signal, back-probe at the control module connector and verify signal arrival. If good at wheel but lost at module, inspect wiring continuity and repair shorts/opens.
  7. Repair or replace the faulty sensor, wiring, connector or tone ring as required. After repairs clear codes and road-test to confirm the fault does not return and that live-data signals are within expected ranges.
  8. If all hardware and wiring checks good, consider diagnosing the ABS/BCM input circuit or replacing the control module per manufacturer procedure.

Likely causes

  • Corroded/loose connector at the rear speed sensor
  • Failed rear wheel speed sensor
  • Broken/shorted signal wire between sensor and control module
  • Damaged or missing tone ring on hub or axle

Fault status

⚠️ Status
Rear speed sensor input signal low — the control module is detecting a low or missing signal from a rear wheel speed sensor. Check sensor, wiring, connector, tone ring and module input circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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