The P0370 code indicates that the engine control module (PCM) has detected an irregularity or missing signal from the high-resolution timing reference sensor. This signal is essential for the precise synchronization of fuel injection and ignition timing.
The sensor itself has failed internally or is no longer capable of producing a clean voltage signal.
Frayed, shorted, or corroded wires between the sensor and the PCM can distort the timing signal.
A bent, chipped, or fouled tone ring/reluctor wheel prevents the sensor from reading a consistent timing pulse.
Corroded or loose electrical connectors create high resistance or intermittent signal loss.
An internal circuit failure within the engine computer prevents the processing of the timing signal.
No. While the PCM is listed as a possibility, it is rarely the cause. Most P0370 issues are resolved by replacing the failed sensor or repairing damaged wiring.
Yes, metallic shavings or heavy oil buildup on the sensor tip can interfere with the magnetic reading and trigger the code.
Depending on the vehicle, it may operate in a limited 'limp mode' with poor performance, or it may stall and refuse to start if the timing signal is completely lost.