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Home / DTC / P0195 — Engine Oil Temperature Sensor A Circuit

P0195 — Engine Oil Temperature Sensor A Circuit

Detailed page for trouble code P0195.

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59brands
11,914generic
22,491specific
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P0195

Generic P — Powertrain

Engine Oil Temperature Sensor A Circuit

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

Causes

  • Open or shorted wiring between oil temp sensor and PCM
  • Corroded, loose or damaged sensor connector or pins
  • Failed engine oil temperature sensor (NTC or resistance-type)
  • Poor or missing reference voltage or ground at sensor circuit
  • Intermittent contact from vibration or heat
  • PCM input fault (rare)

Symptoms

  • Check engine light (MIL) illuminated
  • Incorrect oil temperature reported on cluster or scan tool
  • Cold/hot engine performance adaptations may be affected (hard starts, poor idle, altered shift logic)
  • Possible limp mode or derated performance on some vehicles
  • Intermittent warning or MIL if circuit is intermittent

What to check

  • Read and record freeze frame and live data for oil temperature and related sensors using a scan tool
  • Confirm other related codes (coolant temp, ambient temp) to spot common wiring issues
  • Visually inspect sensor, connector, and wiring for damage, oil contamination, and proper routing
  • Wiggle test harness and connector while monitoring live data to detect intermittent faults
  • Backprobe connector to verify sensor reference voltage and ground at ignition on
  • Measure sensor resistance at known temperatures (ambient and warmed) and compare to expected behavior

Signal parameters

  • General: sensor is typically a 2- or 3‑wire NTC/resistance-type providing a 0–5 V signal or a variable resistance to PCM
  • Reference voltage (if present): approximately 5.0 V (verify with vehicle-specific data)
  • Expected sensor signal: varies with temperature — lower voltage/higher resistance at low temp, higher voltage/lower resistance at high temp (vehicle-dependent)
  • Typical guidance: open circuit indicated by very high resistance or signal near reference voltage (>4.5 V); short to ground indicated by near 0 V or very low resistance (
  • Room-temperature resistance commonly falls in the kilohm range for many sensors (vehicle-specific values required for exact numbers)

Diagnostic algorithm

  1. Retrieve freeze-frame and live data; verify P0195 is active and note oil temp reading and whether it’s frozen/stuck or erratic.
  2. Perform a visual inspection: sensor location, connector condition, wiring harness routing, signs of oil soak, melted insulation, or pin corrosion.
  3. Disconnect sensor connector and inspect pins for corrosion, bending, or pushed-out terminals. Repair or replace connector as needed.
  4. With key ON (engine off), backprobe connector and verify reference voltage and ground presence at the PCM side per vehicle specifications. No reference/ground fault indicates wiring/PCM issue.
  5. Measure sensor resistance at ambient. If safe, warm engine and measure change in resistance — resistance should change smoothly with temperature. If no change, sensor may be bad.
  6. Check for shorts/opens: measure continuity between sensor signal pin and PCM; check for shorts to battery, ground, or other circuits. Repair damaged wiring.
  7. If wiring and connector are good but readings are out of spec, replace the oil temperature sensor with correct OEM-type sensor.
  8. After repair, clear codes and perform functional test/road test while monitoring live oil temperature data to ensure proper operation and no return of code.
  9. If fault persists and wiring and sensor are verified good, consider PCM input fault and consult vehicle-specific diagnostics or manufacturer bulletin.

Likely causes

  • Damaged harness insulation or chafed wire near engine
  • Connector contaminated with oil, corrosion, or bent terminals
  • Sensor element failed from heat/oil exposure or mechanical damage
  • Connector not fully seated after recent service
  • Aftermarket sensor or wrong replacement with different resistance curve

Fault status

⚠️ Status
Engine Oil Temperature Sensor A Circuit — electrical fault detected in oil temperature sensor circuit (open, short, or implausible signal).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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P0192 P0193 P0194 P0115 P0116
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Code

P0195

GWM P — Powertrain

- Oil Temperature Sensor Fault

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

Causes

  • Open or shorted wiring between oil temp sensor and PCM
  • Corroded, loose or damaged sensor connector or pins
  • Failed engine oil temperature sensor (NTC or resistance-type)
  • Poor or missing reference voltage or ground at sensor circuit
  • Intermittent contact from vibration or heat
  • PCM input fault (rare)

Symptoms

  • Check engine light (MIL) illuminated
  • Incorrect oil temperature reported on cluster or scan tool
  • Cold/hot engine performance adaptations may be affected (hard starts, poor idle, altered shift logic)
  • Possible limp mode or derated performance on some vehicles
  • Intermittent warning or MIL if circuit is intermittent

What to check

  • Read and record freeze frame and live data for oil temperature and related sensors using a scan tool
  • Confirm other related codes (coolant temp, ambient temp) to spot common wiring issues
  • Visually inspect sensor, connector, and wiring for damage, oil contamination, and proper routing
  • Wiggle test harness and connector while monitoring live data to detect intermittent faults
  • Backprobe connector to verify sensor reference voltage and ground at ignition on
  • Measure sensor resistance at known temperatures (ambient and warmed) and compare to expected behavior

Signal parameters

  • General: sensor is typically a 2- or 3‑wire NTC/resistance-type providing a 0–5 V signal or a variable resistance to PCM
  • Reference voltage (if present): approximately 5.0 V (verify with vehicle-specific data)
  • Expected sensor signal: varies with temperature — lower voltage/higher resistance at low temp, higher voltage/lower resistance at high temp (vehicle-dependent)
  • Typical guidance: open circuit indicated by very high resistance or signal near reference voltage (>4.5 V); short to ground indicated by near 0 V or very low resistance (
  • Room-temperature resistance commonly falls in the kilohm range for many sensors (vehicle-specific values required for exact numbers)

Diagnostic algorithm

  1. Retrieve freeze-frame and live data; verify P0195 is active and note oil temp reading and whether it’s frozen/stuck or erratic.
  2. Perform a visual inspection: sensor location, connector condition, wiring harness routing, signs of oil soak, melted insulation, or pin corrosion.
  3. Disconnect sensor connector and inspect pins for corrosion, bending, or pushed-out terminals. Repair or replace connector as needed.
  4. With key ON (engine off), backprobe connector and verify reference voltage and ground presence at the PCM side per vehicle specifications. No reference/ground fault indicates wiring/PCM issue.
  5. Measure sensor resistance at ambient. If safe, warm engine and measure change in resistance — resistance should change smoothly with temperature. If no change, sensor may be bad.
  6. Check for shorts/opens: measure continuity between sensor signal pin and PCM; check for shorts to battery, ground, or other circuits. Repair damaged wiring.
  7. If wiring and connector are good but readings are out of spec, replace the oil temperature sensor with correct OEM-type sensor.
  8. After repair, clear codes and perform functional test/road test while monitoring live oil temperature data to ensure proper operation and no return of code.
  9. If fault persists and wiring and sensor are verified good, consider PCM input fault and consult vehicle-specific diagnostics or manufacturer bulletin.

Likely causes

  • Damaged harness insulation or chafed wire near engine
  • Connector contaminated with oil, corrosion, or bent terminals
  • Sensor element failed from heat/oil exposure or mechanical damage
  • Connector not fully seated after recent service
  • Aftermarket sensor or wrong replacement with different resistance curve

Fault status

⚠️ Status
Engine Oil Temperature Sensor A Circuit — electrical fault detected in oil temperature sensor circuit (open, short, or implausible signal).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0192 P0193 P0194 P0115 P0116
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Code

P0195

HUMMER P — Powertrain

Engine Oil Temperature Sensor

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

Causes

  • Open or shorted wiring between oil temp sensor and PCM
  • Corroded, loose or damaged sensor connector or pins
  • Failed engine oil temperature sensor (NTC or resistance-type)
  • Poor or missing reference voltage or ground at sensor circuit
  • Intermittent contact from vibration or heat
  • PCM input fault (rare)

Symptoms

  • Check engine light (MIL) illuminated
  • Incorrect oil temperature reported on cluster or scan tool
  • Cold/hot engine performance adaptations may be affected (hard starts, poor idle, altered shift logic)
  • Possible limp mode or derated performance on some vehicles
  • Intermittent warning or MIL if circuit is intermittent

What to check

  • Read and record freeze frame and live data for oil temperature and related sensors using a scan tool
  • Confirm other related codes (coolant temp, ambient temp) to spot common wiring issues
  • Visually inspect sensor, connector, and wiring for damage, oil contamination, and proper routing
  • Wiggle test harness and connector while monitoring live data to detect intermittent faults
  • Backprobe connector to verify sensor reference voltage and ground at ignition on
  • Measure sensor resistance at known temperatures (ambient and warmed) and compare to expected behavior

Signal parameters

  • General: sensor is typically a 2- or 3‑wire NTC/resistance-type providing a 0–5 V signal or a variable resistance to PCM
  • Reference voltage (if present): approximately 5.0 V (verify with vehicle-specific data)
  • Expected sensor signal: varies with temperature — lower voltage/higher resistance at low temp, higher voltage/lower resistance at high temp (vehicle-dependent)
  • Typical guidance: open circuit indicated by very high resistance or signal near reference voltage (>4.5 V); short to ground indicated by near 0 V or very low resistance (
  • Room-temperature resistance commonly falls in the kilohm range for many sensors (vehicle-specific values required for exact numbers)

Diagnostic algorithm

  1. Retrieve freeze-frame and live data; verify P0195 is active and note oil temp reading and whether it’s frozen/stuck or erratic.
  2. Perform a visual inspection: sensor location, connector condition, wiring harness routing, signs of oil soak, melted insulation, or pin corrosion.
  3. Disconnect sensor connector and inspect pins for corrosion, bending, or pushed-out terminals. Repair or replace connector as needed.
  4. With key ON (engine off), backprobe connector and verify reference voltage and ground presence at the PCM side per vehicle specifications. No reference/ground fault indicates wiring/PCM issue.
  5. Measure sensor resistance at ambient. If safe, warm engine and measure change in resistance — resistance should change smoothly with temperature. If no change, sensor may be bad.
  6. Check for shorts/opens: measure continuity between sensor signal pin and PCM; check for shorts to battery, ground, or other circuits. Repair damaged wiring.
  7. If wiring and connector are good but readings are out of spec, replace the oil temperature sensor with correct OEM-type sensor.
  8. After repair, clear codes and perform functional test/road test while monitoring live oil temperature data to ensure proper operation and no return of code.
  9. If fault persists and wiring and sensor are verified good, consider PCM input fault and consult vehicle-specific diagnostics or manufacturer bulletin.

Likely causes

  • Damaged harness insulation or chafed wire near engine
  • Connector contaminated with oil, corrosion, or bent terminals
  • Sensor element failed from heat/oil exposure or mechanical damage
  • Connector not fully seated after recent service
  • Aftermarket sensor or wrong replacement with different resistance curve

Fault status

⚠️ Status
Engine Oil Temperature Sensor A Circuit — electrical fault detected in oil temperature sensor circuit (open, short, or implausible signal).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0192 P0193 P0194 P0115 P0116
Repair manuals

Manual library for HUMMER

138

Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HUMMER

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Code

P0195

LAND ROVER P — Powertrain

Engine oil temperature sensor circuit

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

Causes

  • Open or shorted wiring between oil temp sensor and PCM
  • Corroded, loose or damaged sensor connector or pins
  • Failed engine oil temperature sensor (NTC or resistance-type)
  • Poor or missing reference voltage or ground at sensor circuit
  • Intermittent contact from vibration or heat
  • PCM input fault (rare)

Symptoms

  • Check engine light (MIL) illuminated
  • Incorrect oil temperature reported on cluster or scan tool
  • Cold/hot engine performance adaptations may be affected (hard starts, poor idle, altered shift logic)
  • Possible limp mode or derated performance on some vehicles
  • Intermittent warning or MIL if circuit is intermittent

What to check

  • Read and record freeze frame and live data for oil temperature and related sensors using a scan tool
  • Confirm other related codes (coolant temp, ambient temp) to spot common wiring issues
  • Visually inspect sensor, connector, and wiring for damage, oil contamination, and proper routing
  • Wiggle test harness and connector while monitoring live data to detect intermittent faults
  • Backprobe connector to verify sensor reference voltage and ground at ignition on
  • Measure sensor resistance at known temperatures (ambient and warmed) and compare to expected behavior

Signal parameters

  • General: sensor is typically a 2- or 3‑wire NTC/resistance-type providing a 0–5 V signal or a variable resistance to PCM
  • Reference voltage (if present): approximately 5.0 V (verify with vehicle-specific data)
  • Expected sensor signal: varies with temperature — lower voltage/higher resistance at low temp, higher voltage/lower resistance at high temp (vehicle-dependent)
  • Typical guidance: open circuit indicated by very high resistance or signal near reference voltage (>4.5 V); short to ground indicated by near 0 V or very low resistance (
  • Room-temperature resistance commonly falls in the kilohm range for many sensors (vehicle-specific values required for exact numbers)

Diagnostic algorithm

  1. Retrieve freeze-frame and live data; verify P0195 is active and note oil temp reading and whether it’s frozen/stuck or erratic.
  2. Perform a visual inspection: sensor location, connector condition, wiring harness routing, signs of oil soak, melted insulation, or pin corrosion.
  3. Disconnect sensor connector and inspect pins for corrosion, bending, or pushed-out terminals. Repair or replace connector as needed.
  4. With key ON (engine off), backprobe connector and verify reference voltage and ground presence at the PCM side per vehicle specifications. No reference/ground fault indicates wiring/PCM issue.
  5. Measure sensor resistance at ambient. If safe, warm engine and measure change in resistance — resistance should change smoothly with temperature. If no change, sensor may be bad.
  6. Check for shorts/opens: measure continuity between sensor signal pin and PCM; check for shorts to battery, ground, or other circuits. Repair damaged wiring.
  7. If wiring and connector are good but readings are out of spec, replace the oil temperature sensor with correct OEM-type sensor.
  8. After repair, clear codes and perform functional test/road test while monitoring live oil temperature data to ensure proper operation and no return of code.
  9. If fault persists and wiring and sensor are verified good, consider PCM input fault and consult vehicle-specific diagnostics or manufacturer bulletin.

Likely causes

  • Damaged harness insulation or chafed wire near engine
  • Connector contaminated with oil, corrosion, or bent terminals
  • Sensor element failed from heat/oil exposure or mechanical damage
  • Connector not fully seated after recent service
  • Aftermarket sensor or wrong replacement with different resistance curve

Fault status

⚠️ Status
Engine Oil Temperature Sensor A Circuit — electrical fault detected in oil temperature sensor circuit (open, short, or implausible signal).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0192 P0193 P0194 P0115 P0116
320

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

LAND ROVER

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