What does code P1219 mean?

Q: What does code P1219 mean?

Throttle Position Sensor Reference Voltage. P1219 on GM vehicles indicates that the powertrain control module (PCM) has detected an out-of-range reference voltage on the throttle position sensor (TPS) circuit, typically the 5-volt supply line. The PCM monitors this voltage to determine throttle plate position, and when the signal falls outside the expected range, it sets this code and may limit engine power.

DTC codes / GM codes / P1219

P1219 · GMThrottle Position Sensor Reference Voltage

P1219 on GM vehicles indicates that the powertrain control module (PCM) has detected an out-of-range reference voltage on the throttle position sensor (TPS) circuit, typically the 5-volt supply line. The PCM monitors this voltage to determine throttle plate position, and when the signal falls outside the expected range, it sets this code and may limit engine power.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

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