P21DF
Cylinder 2 Injector B Circuit High
P21DF is an OBD-II diagnostic trouble code meaning: Cylinder 2 Injector B Circuit High. Common causes: cylinder 2 injector malfunction, open or short circuit in wiring harness. Estimated repair cost: $17–89.
Symptoms
- Unstable engine operation
- Power dips
- Increased fuel consumption
- Increased emissions
- Check Engine Light Illuminates
Causes
- Cylinder 2 injector malfunction
- Open or short circuit in wiring harness
- Poor contact in the injector connectors
- Malfunction of the injector driver in the ECU
- Contact corrosion
How to Fix
- Check the resistance of the injector of cylinder 2
- Inspect the wiring harness and connectors for damage.
- Check the voltage on the injector circuit
- Replace the injector if necessary
- Test the operation of the ECU
Related codes
Error P21DF by Vehicle Brand
FAQ
What does the P21DF code mean?
P21DF is an OBD-II diagnostic trouble code that indicates: Cylinder 2 Injector B Circuit High
What causes a P21DF error code?
The most common causes of P21DF include: Cylinder 2 injector malfunction; Open or short circuit in wiring harness; Poor contact in the injector connectors; Malfunction of the injector driver in the ECU.
How do I fix a P21DF diagnostic trouble code?
To fix P21DF: Check the resistance of the injector of cylinder 2. Inspect the wiring harness and connectors for damage.. Check the voltage on the injector circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21DF?
Limited driving only, diagnose soon
How much does it cost to fix P21DF?
The estimated repair cost for P21DF is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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