AutoCodes – Chevrolet – P1250 Chevrolet

P1250 Chevrolet Code - Early Fuel Evaporation Heater Circuit

Quick Answer

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. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1250 Chevrolet indicates Early Fuel Evaporation Heater Circuit.
Common causes: Common causes include 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.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 6,906

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1250 Chevrolet Description

OBDII Code P1250 Chevrolet - Early Fuel Evaporation Heater Circuit - AutoCodes.com — P1250 Chevrolet Code - Early Fuel Evaporation Heater Circuit

What does this mean?

What are the Possible Causes of the DTC P1250 Chevrolet?

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 to Fix the DTC P1250 Chevrolet?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1250 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.