What does code P1370 mean?

Q: What does code P1370 mean?

IC Module 4X Reference Circuit Too Many Pulses. P1370 on GM vehicles means the ignition control (IC) module is sending more 4X reference pulses to the powertrain control module (PCM) than expected for the current engine speed. The PCM compares the 4X signal to the camshaft and crankshaft signals and sets this code when the pulse count is too high, indicating a noisy or erratic reference circuit.

DTC codes / GM codes / P1370

P1370 · GMIC Module 4X Reference Circuit Too Many Pulses

P1370 on GM vehicles means the ignition control (IC) module is sending more 4X reference pulses to the powertrain control module (PCM) than expected for the current engine speed. The PCM compares the 4X signal to the camshaft and crankshaft signals and sets this code when the pulse count is too high, indicating a noisy or erratic reference circuit.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyProfessional

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.