Engine Oil Temperature Sensor Range/Performance
The engine oil temperature sensor is reporting a voltage or resistance reading that is outside the acceptable range for proper engine operation. This code indicates the sensor may be faulty, the wiring is damaged, or the PCM is not receiving valid data from the oil temperature sensor.
What You Might Notice
- Check Engine Light illuminated
- Inaccurate oil temperature gauge readings
- Poor fuel economy
- Engine running hotter than normal
- Potential limp mode or reduced performance
Most Common Causes
- 1
Faulty Engine Oil Temperature Sensor
The oil temperature sensor has failed internally or developed an electrical fault, causing it to send out-of-range signals to the PCM.
- 2
Wiring or Connector Problems
Corroded, damaged, or loose wiring between the oil temperature sensor and PCM prevents proper signal transmission.
- 3
Engine Cooling System Issues
Low coolant levels or thermostat failure can cause abnormal oil temperature readings that trigger the code.
- 4
Faulty PCM or Software Problem
The powertrain control module may have a defect or outdated firmware preventing proper sensor signal interpretation.
How to Diagnose It
- 1
Check Faulty Engine Oil Temperature Sensor — The oil temperature sensor has failed internally or developed an electrical fault, causing it to send out-of-range signals to the PCM.
- 2
Check Wiring or Connector Problems — Corroded, damaged, or loose wiring between the oil temperature sensor and PCM prevents proper signal transmission.
- 3
Check Engine Cooling System Issues — Low coolant levels or thermostat failure can cause abnormal oil temperature readings that trigger the code.
- 4
Check Faulty PCM or Software Problem — The powertrain control module may have a defect or outdated firmware preventing proper sensor signal interpretation.
How to Fix It
- 1
Test and Replace Oil Temperature Sensor
Use a multimeter to test the sensor resistance across its operating range. If readings are out of specification, replace the sensor with a new OEM part.
- 2
Inspect and Repair Wiring
Check all wiring and connectors between the sensor and PCM for corrosion, damage, or loose connections. Repair or replace damaged wiring as needed.
- 3
Check Engine Cooling System
Verify coolant level is adequate and the thermostat is functioning properly. Top off coolant if low and test for proper temperature regulation.
- 4
Update PCM Software or Replace PCM
Contact the vehicle manufacturer to check for available PCM software updates. If updates don't resolve the issue, the PCM may need replacement.
Need a deeper diagnosis?
Search for related repair guides or browse by system.