P1250 CADILLAC - Early Fuel Evaporation Heater Circuit
- Faulty Early Fuel Evaporation (EFE) resistor
- Early Fuel Evaporation (EFE) resistor harness is open or shorted
- Early Fuel Evaporation (EFE) resistor circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P1250 Cadillac DescriptionWith the engine running, BARO input over 75 kPa, Intake Air Temperature (IAT) input from 14-122°F, fuel level over 25% then the Powertrain Control Module (PCM) detects that the Early Fuel Evaporation (EFE) resistor circuit voltage was below 2.5v with the EFE heater off, or the circuit voltage was over 0.3v with the EFE heater on for 5 seconds.
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