P1250 CADILLAC Possible Causes
- Faulty Early Fuel Evaporation (EFE) heater
- Early Fuel Evaporation (EFE) heater circuit open or shorted
- Poor electrical connection in the Early Fuel Evaporation (EFE) heater circuit
How is the P1250 CADILLAC code repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine Light On (or Service Engine Soon Warning Light)
P1250 CADILLAC Meaning
With the engine running, BARO input greater than 75 kPa, Intake Air Temperature (IAT) input between 14 and 122°F, fuel level above 25%, then the Powertrain Control Module (PCM) detected that the Early Fuel Evaporation (EFE) heater circuit voltage was less than 2.5V with the EFE heater off, or the circuit voltage was greater than 0.3V with the EFE heater on for 5 seconds.