P21EF
Cylinder 10 Injector B Circuit High
P21EF is an OBD-II diagnostic trouble code meaning: Cylinder 10 Injector B Circuit High. Common causes: cylinder 10 injector malfunction, open or short circuit in control circuit. Estimated repair cost: $33–167.
Symptoms
- Uneven engine operation
- Increased fuel consumption
- Misfire in cylinder 10
- Check Engine Light Illuminates
- Reduced engine power
Causes
- Cylinder 10 injector malfunction
- Open or short circuit in control circuit
- Poor contact in the injector connector
- Engine control unit malfunction
- Wiring harness damage
How to Fix
- Check the resistance of the injector of cylinder 10
- Inspect the control circuit for damage
- Check the contacts in the injector connector
- Test the operation of the injector driver in the ECU
- If necessary, replace the nozzle or repair the wiring
Related codes
Error P21EF by Vehicle Brand
FAQ
What does the P21EF code mean?
P21EF is an OBD-II diagnostic trouble code that indicates: Cylinder 10 Injector B Circuit High
What causes a P21EF error code?
The most common causes of P21EF include: Cylinder 10 injector malfunction; Open or short circuit in control circuit; Poor contact in the injector connector; Engine control unit malfunction.
How do I fix a P21EF diagnostic trouble code?
To fix P21EF: Check the resistance of the injector of cylinder 10. Inspect the control circuit for damage. Check the contacts in the injector connector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21EF?
Yes, but get it checked soon
How much does it cost to fix P21EF?
The estimated repair cost for P21EF is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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