P0271 2014 GMC Sierra Code - Cylinder 4 Injector Control Circuit High Voltage
Quick Answer
The diagnostic trouble code P0271 in a 2014 GMC Sierra indicates an issue with the injector control circuit for cylinder 4, specifically reporting high voltage. Common causes include Faulty fuel injector in cylinder 4, Wiring issues in the injector control circuit, PCM malfunction. 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
- P0271 2014 GMC Sierra indicates Cylinder 4 Injector Control Circuit High Voltage.
- Common causes
- Common causes include Faulty fuel injector in cylinder 4, Wiring issues in the injector control circuit, PCM malfunction.
- 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 P0271 2014 GMC Sierra Description
The diagnostic trouble code P0271 in a 2014 GMC Sierra indicates an issue with the injector control circuit for cylinder 4, specifically reporting high voltage. This code is typically triggered when the powertrain control module (PCM) detects that the voltage in the control circuit for the fuel injector in cylinder 4 is higher than the specified range.
Common Causes of P0271 2014 GMC Sierra
- Faulty fuel injector in cylinder 4
- Wiring issues in the injector control circuit
- PCM malfunction
- Poor connection in the circuit
- Corrosion or damage to electrical connectors
Symptoms of P0271 2014 GMC Sierra
- Rough idling
- Engine misfires
- Decreased fuel efficiency
- Engine stalling
- Check Engine Light illuminated
How to Fix P0271 2014 GMC Sierra
- Begin by conducting a thorough inspection of the injector control circuit for cylinder 4, checking for any visible damage or loose connections.
- Test the fuel injector in cylinder 4 to determine if it is functioning properly. If it is found to be faulty, it will need to be replaced.
- Check the wiring harness for any signs of damage or wear. Repair or replace any damaged wiring as needed.
- Clear the diagnostic trouble codes from the PCM and perform a test drive to ensure that the issue has been resolved.
- If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the high voltage in the injector control circuit.
Cost to Fix P0271 2014 GMC Sierra
The cost of repairing a cylinder 4 injector control circuit high voltage issue in a 2014 GMC Sierra can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of replacing a fuel injector can range from $150 to $300 per injector, not including labor costs. Wiring repairs or PCM replacement can add to the overall cost. Labor rates at auto repair shops typically range from $80 to $150 per hour, so the total repair cost can vary based on the shop's rates and the time required for the repair. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on the specific circumstances of the vehicle.
Tech Notes for P0271 2014 GMC Sierra
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