P21D8
Cylinder 10 Injector B Circuit/Open
P21D8 is an OBD-II diagnostic trouble code meaning: Cylinder 10 Injector B Circuit/Open. Common causes: open or short circuit in the injector circuit, cylinder 10 injector malfunction. Estimated repair cost: $17–56.
Symptoms
- Misfire in cylinder 10
- Reduced engine power
- Increased fuel consumption
- Unstable engine idling
- Check Engine Light Illuminates
Causes
- Open or short circuit in the injector circuit
- Cylinder 10 injector malfunction
- Problems with the engine control unit
- Wiring harness damage
- Corroded contacts or poor connection
How to Fix
- Check the integrity of the injector circuit
- Measure the injector resistance
- Check connections and contacts
- Replace the faulty injector if necessary
- Check and replace damaged wires
Related codes
Error P21D8 by Vehicle Brand
FAQ
What does the P21D8 code mean?
P21D8 is an OBD-II diagnostic trouble code that indicates: Cylinder 10 Injector B Circuit/Open
What causes a P21D8 error code?
The most common causes of P21D8 include: Open or short circuit in the injector circuit; Cylinder 10 injector malfunction; Problems with the engine control unit; Wiring harness damage.
How do I fix a P21D8 diagnostic trouble code?
To fix P21D8: Check the integrity of the injector circuit. Measure the injector resistance. Check connections and contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21D8?
Limited driving only, diagnose soon
How much does it cost to fix P21D8?
The estimated repair cost for P21D8 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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