P231A
Cylinder 7 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance
P231A is an OBD-II diagnostic trouble code meaning: Cylinder 7 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance. Common causes: faulty fuel injector of cylinder 7, problems with the ignition system (plugs, coil). Estimated repair cost: $17–89.
Symptoms
- Unstable engine idling
- Reduced engine power
- Increased fuel consumption
- Misfire in cylinder 7
- Check Engine Light Illuminates
Causes
- Faulty fuel injector of cylinder 7
- Problems with the ignition system (plugs, coil)
- Vacuum leak in the area of cylinder 7
- Low compression in cylinder 7
- Problems with the oxygen sensor or mass air flow sensor
How to Fix
- Check the condition of the fuel injector of cylinder 7
- Inspect the spark plug and coil of cylinder 7
- Check compression in cylinder 7
- Diagnose the system for vacuum leaks
- Check the readings of the oxygen sensors and mass air flow sensor
Related codes
Error P231A by Vehicle Brand
FAQ
What does the P231A code mean?
P231A is an OBD-II diagnostic trouble code that indicates: Cylinder 7 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance
What causes a P231A error code?
The most common causes of P231A include: Faulty fuel injector of cylinder 7; Problems with the ignition system (plugs, coil); Vacuum leak in the area of cylinder 7; Low compression in cylinder 7.
How do I fix a P231A diagnostic trouble code?
To fix P231A: Check the condition of the fuel injector of cylinder 7. Inspect the spark plug and coil of cylinder 7. Check compression in cylinder 7. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P231A?
Limited driving only, diagnose soon
How much does it cost to fix P231A?
The estimated repair cost for P231A is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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