What does code P1250 mean?

Q: What does code P1250 mean?

Early Fuel Evaporation Heater Circuit. P1250 on GM vehicles indicates that the powertrain control module (PCM) has detected a fault in the early fuel evaporation (EFE) heater circuit, which preheats the intake manifold during cold starts to improve fuel vaporization and reduce emissions. The PCM monitors the heater circuit for expected voltage or current and sets the code when the signal is out of range, typically due to an open, short, or excessive resistance in the circuit.

DTC codes / GM codes / P1250

P1250 · GMEarly Fuel Evaporation Heater Circuit

P1250 on GM vehicles indicates that the powertrain control module (PCM) has detected a fault in the early fuel evaporation (EFE) heater circuit, which preheats the intake manifold during cold starts to improve fuel vaporization and reduce emissions. The PCM monitors the heater circuit for expected voltage or current and sets the code when the signal is out of range, typically due to an open, short, or excessive resistance in the circuit.

SystemPowertrain

Code typeGM specific

SeverityLow

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.