P21D3
Cylinder 5 Injector B Circuit/Open
P21D3 is an OBD-II diagnostic trouble code meaning: Cylinder 5 Injector B Circuit/Open. Common causes: broken wires to the injector of cylinder 5, malfunction of the injector itself. Estimated repair cost: $17–89.
Symptoms
- Unstable engine operation
- Misfire in cylinder 5
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Is On
Causes
- Broken wires to the injector of cylinder 5
- Malfunction of the injector itself
- Problems with the injector connector
- Engine control unit malfunction
- Short circuit in the injector circuit
How to Fix
- Check the integrity of the wires to the injector
- Check injector resistance
- Inspect the injector connector for oxidation.
- Check the power supply and control signal to the injector
- If necessary, replace the nozzle or repair the wiring
Related codes
Error P21D3 by Vehicle Brand
FAQ
What does the P21D3 code mean?
P21D3 is an OBD-II diagnostic trouble code that indicates: Cylinder 5 Injector B Circuit/Open
What causes a P21D3 error code?
The most common causes of P21D3 include: Broken wires to the injector of cylinder 5; Malfunction of the injector itself; Problems with the injector connector; Engine control unit malfunction.
How do I fix a P21D3 diagnostic trouble code?
To fix P21D3: Check the integrity of the wires to the injector. Check injector resistance. Inspect the injector connector for oxidation.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21D3?
Limited driving only, diagnose soon
How much does it cost to fix P21D3?
The estimated repair cost for P21D3 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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