P21D6
Cylinder 8 Injector B Circuit/Open
P21D6 is an OBD-II diagnostic trouble code meaning: Cylinder 8 Injector B Circuit/Open. Common causes: open or short circuit in the injector circuit, cylinder 8 injector malfunction. Estimated repair cost: $28–89.
Symptoms
- Unstable engine operation at idle
- Power Loss
- Increased fuel consumption
- Misfire in cylinder 8
- Check Engine Light Is On
Causes
- Open or short circuit in the injector circuit
- Cylinder 8 injector malfunction
- Poor contact in the injector connector
- Wiring harness damage
- Engine control unit malfunction
How to Fix
- Check the resistance of the injector of cylinder 8
- Inspect the injector connector and wires for damage.
- Check the voltage at the injector connector
- If necessary, replace the injector
- Check the operation of the engine control unit
Related codes
Error P21D6 by Vehicle Brand
FAQ
What does the P21D6 code mean?
P21D6 is an OBD-II diagnostic trouble code that indicates: Cylinder 8 Injector B Circuit/Open
What causes a P21D6 error code?
The most common causes of P21D6 include: Open or short circuit in the injector circuit; Cylinder 8 injector malfunction; Poor contact in the injector connector; Wiring harness damage.
How do I fix a P21D6 diagnostic trouble code?
To fix P21D6: Check the resistance of the injector of cylinder 8. Inspect the injector connector and wires for damage.. Check the voltage at the injector connector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21D6?
Limited driving only, diagnose soon
How much does it cost to fix P21D6?
The estimated repair cost for P21D6 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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