P1250 GMC

Early Fuel Evaporation Heater Circuit

Table of contents

• Possible Causes
• How To Fix
• Cost To Diagnose
• Possible Symptoms
• Description

P1250 GMC Possible Causes

• 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

How do I fix code P1250 GMC?

  Check 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’s pins.

Cost of diagnosing the P1250 GMC code

  The cost of diagnosing the P1250 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

• Engine Light ON (or Service Engine Soon Warning Light)

P1250 GMC Description

  With 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.