What does code P1554 mean?

Q: What does code P1554 mean?

Cruise Engaged Circuit High Voltage. P1554 on a GM vehicle means the cruise control module has detected an abnormally high voltage on the circuit that confirms the cruise system is engaged, which usually points to a wiring or switch problem rather than a failed module. The computer expects a specific voltage range on that engagement signal and flags the code when the reading stays above the upper limit for a set period.

DTC codes / GM codes / P1554

P1554 · GMCruise Engaged Circuit High Voltage

P1554 on a GM vehicle means the cruise control module has detected an abnormally high voltage on the circuit that confirms the cruise system is engaged, which usually points to a wiring or switch problem rather than a failed module. The computer expects a specific voltage range on that engagement signal and flags the code when the reading stays above the upper limit for a set period.

SystemPowertrain

Code typeGM specific

SeverityLow

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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