P0271
Cylinder 4 Injector A Circuit High
P0271 is an OBD-II diagnostic trouble code meaning: Cylinder 4 Injector A Circuit High. Common causes: broken or damaged injector wiring harness, cylinder 4 injector malfunction. Estimated repair cost: $56–167.
Symptoms
- Misfire in cylinder 4
- Unstable engine operation
- Power reduction
- Increased fuel consumption
Causes
- Broken or damaged injector wiring harness
- Cylinder 4 injector malfunction
- Corrosion of contacts in connectors
- Problems with injector power supply
- Faulty injector driver in ECU
How to Fix
- Check the resistance of the injector of cylinder 4
- Inspect the wiring harness for damage
- Check the contacts in the injector and ECU connectors
- Check injector power supply
- If necessary, replace the injector or wiring harness
Related codes
Error P0271 by Vehicle Brand
FAQ
What does the P0271 code mean?
P0271 is an OBD-II diagnostic trouble code that indicates: Cylinder 4 Injector A Circuit High
What causes a P0271 error code?
The most common causes of P0271 include: Broken or damaged injector wiring harness; Cylinder 4 injector malfunction; Corrosion of contacts in connectors; Problems with injector power supply.
How do I fix a P0271 diagnostic trouble code?
To fix P0271: Check the resistance of the injector of cylinder 4. Inspect the wiring harness for damage. Check the contacts in the injector and ECU connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0271?
Limited driving only, diagnose soon
How much does it cost to fix P0271?
The estimated repair cost for P0271 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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