P21F2
Cylinder 12 Injector B Circuit Low
P21F2 is an OBD-II diagnostic trouble code meaning: Cylinder 12 Injector B Circuit Low. Common causes: malfunction of the fuel injector of cylinder 12, open or short circuit in control circuit. Estimated repair cost: $28–89.
Symptoms
- Unstable engine operation
- Power reduction
- Increased fuel consumption
- Misfire in cylinder 12
- Check Engine Light Is On
Causes
- Malfunction of the fuel injector of cylinder 12
- Open or short circuit in control circuit
- Poor contact in the injector connectors
- Engine control unit malfunction
- Problems with injector power supply
How to Fix
- Check the resistance of the injector of cylinder 12
- Inspect the wiring harness and connectors for damage.
- Check the voltage in the injector control circuit
- If necessary, replace the faulty injector
- Scan the control unit for other errors
Related codes
Error P21F2 by Vehicle Brand
FAQ
What does the P21F2 code mean?
P21F2 is an OBD-II diagnostic trouble code that indicates: Cylinder 12 Injector B Circuit Low
What causes a P21F2 error code?
The most common causes of P21F2 include: Malfunction of the fuel injector of cylinder 12; Open or short circuit in control circuit; Poor contact in the injector connectors; Engine control unit malfunction.
How do I fix a P21F2 diagnostic trouble code?
To fix P21F2: Check the resistance of the injector of cylinder 12. Inspect the wiring harness and connectors for damage.. Check the voltage in the injector control circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21F2?
Limited driving only, diagnose soon
How much does it cost to fix P21F2?
The estimated repair cost for P21F2 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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