P21E0
Cylinder 3 Injector B Circuit Low
P21E0 is an OBD-II diagnostic trouble code meaning: Cylinder 3 Injector B Circuit Low. Common causes: open or short circuit in the injector circuit, cylinder 3 injector malfunction. Estimated repair cost: $28–89.
Symptoms
- Unstable engine operation
- Increased fuel consumption
- Power Loss
- Misfire in cylinder 3
- Check Engine Light Is On
Causes
- Open or short circuit in the injector circuit
- Cylinder 3 injector malfunction
- Connector problems or contact corrosion
- Engine control unit malfunction
- Wiring harness damage
How to Fix
- Check the integrity of the injector control circuit
- Test injector resistance
- Inspect connectors and contacts for damage
- If necessary, replace the injector
- Check the operation of the engine control unit
Related codes
Error P21E0 by Vehicle Brand
FAQ
What does the P21E0 code mean?
P21E0 is an OBD-II diagnostic trouble code that indicates: Cylinder 3 Injector B Circuit Low
What causes a P21E0 error code?
The most common causes of P21E0 include: Open or short circuit in the injector circuit; Cylinder 3 injector malfunction; Connector problems or contact corrosion; Engine control unit malfunction.
How do I fix a P21E0 diagnostic trouble code?
To fix P21E0: Check the integrity of the injector control circuit. Test injector resistance. Inspect connectors and contacts for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21E0?
Limited driving only, diagnose soon
How much does it cost to fix P21E0?
The estimated repair cost for P21E0 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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