Engine Cylinder Temperature Sensor Fault
The engine control module detected a problem with the cylinder temperature sensor.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The cylinder temperature sensor monitors how hot each engine cylinder gets during operation. If it gets too hot, the engine could damage itself, and the sensor's readings help the computer to adjust fuel and timing accordingly.
What the computer is actually seeing
The engine computer sees abnormal resistance or voltage from the cylinder temperature sensor circuit, indicating a fault that it cannot interpret correctly.
What a healthy reading looks like
Expected resistance values at the sensor should be between 1kΩ and 10kΩ depending on temperature; voltage should be around 0.5V to 4.5V during operation.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check for any visible wiring damage or corroded connectors related to the cylinder temperature sensor.
- 2Verify voltage at the sensor connector; you should see a clean signal between 0.5V to 4.5V.
- 3Test the resistance of the temperature sensor; it should be within 1kΩ to 10kΩ.
- 4If readings are out of expected values, replace the sensor; if not, check the wiring back to the ECM.
Common causes
- Faulty cylinder temperature sensor
- Wiring issues in the sensor circuit
- Corroded or loose connectors
- Engine overheating due to other issues
Typical repair cost
$$-$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's better to get this fixed soon as engine overheating can cause severe damage.
Will this code come back after clearing?
It can return if the underlying problem isn't fixed.
Why does this code pair with SPN 8102?
SPN 8102 relates to a different but related sensor failure that may affect engine performance.
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