What does code P1375 mean?

Q: What does code P1375 mean?

24X Reference Circuit High Voltage. P1375 on a GM vehicle means the engine control module (ECM) has detected an abnormally high voltage on the 24X reference circuit, which is the high-resolution crankshaft position signal used for precise ignition and fuel timing. The ECM expects the 24X signal to switch between a low and high voltage state as the crankshaft rotates, and a continuous high reading indicates a short to voltage, an open ground path, or a failed sensor.

DTC codes / GM codes / P1375

P1375 · GM24X Reference Circuit High Voltage

P1375 on a GM vehicle means the engine control module (ECM) has detected an abnormally high voltage on the 24X reference circuit, which is the high-resolution crankshaft position signal used for precise ignition and fuel timing. The ECM expects the 24X signal to switch between a low and high voltage state as the crankshaft rotates, and a continuous high reading indicates a short to voltage, an open ground path, or a failed sensor.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.