P1366 Code Description
The P1366 diagnostic trouble code (DTC) relates to the engine’s Top Dead Center (TDC) sensor 2. This code indicates an intermittent interruption in the TDC sensor 2 signal, which is responsible for determining the crankshaft position relative to the top dead center of the compression stroke. This information is crucial for the Engine Control Module (ECM) to accurately time the ignition and fuel injection processes. An intermittent sensor signal interruption can lead to misfires, poor engine performance, and even stalling. If not addressed, this issue can potentially cause long-term damage to the engine and other related components.
Common Causes of P1366
NOTE: The listed causes may not be a complete list of all potential issues, and there may be other causes.
- Faulty TDC sensor 2
- Wiring or connector issues in the sensor circuit
- Corrosion or damage to the sensor terminals
- Engine vibrations affecting the sensor signal
- ECM software or hardware problems
Symptoms of P1366
- Engine misfires
- Rough idling or stalling
- Decreased fuel efficiency
- Difficulty starting the engine
- Illumination of the check engine light
How to Fix P1366
- Start by diagnosing the issue using a scan tool to confirm the presence of the P1366 code.
- Inspect the TDC sensor 2, wiring, and connectors for any visible damage or corrosion.
- Test the sensor’s resistance and signal output to determine if it is functioning correctly.
- Replace the TDC sensor 2 if it is found to be faulty or not providing consistent signals.
- Clear the DTC and perform a road test to ensure the issue has been resolved.