P21A6
Cylinder 11 Air-Fuel Ratio Imbalance
P21A6 is an OBD-II diagnostic trouble code meaning: Cylinder 11 Air-Fuel Ratio Imbalance. Common causes: dirty or faulty fuel injectors, air leaks in the intake manifold. Estimated repair cost: $17–89.
Symptoms
- Uneven engine operation
- Increased fuel consumption
- Reduced engine power
- Check Engine light comes on
- Possible misfires
Causes
- Dirty or faulty fuel injectors
- Air leaks in the intake manifold
- Oxygen sensor malfunction
- Problems with the exhaust gas recirculation (EGR) system
- Malfunction of the mass air flow sensor (MAF)
How to Fix
- Check the condition of the fuel injectors of cylinder 11
- Examine the intake tract for air leaks
- Check the functionality of the oxygen sensor
- Diagnose the EGR system
- Check the MAF readings
Related codes
Error P21A6 by Vehicle Brand
FAQ
What does the P21A6 code mean?
P21A6 is an OBD-II diagnostic trouble code that indicates: Cylinder 11 Air-Fuel Ratio Imbalance
What causes a P21A6 error code?
The most common causes of P21A6 include: Dirty or faulty fuel injectors; Air leaks in the intake manifold; Oxygen sensor malfunction; Problems with the exhaust gas recirculation (EGR) system.
How do I fix a P21A6 diagnostic trouble code?
To fix P21A6: Check the condition of the fuel injectors of cylinder 11. Examine the intake tract for air leaks. Check the functionality of the oxygen sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21A6?
Yes, but get it checked soon
How much does it cost to fix P21A6?
The estimated repair cost for P21A6 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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