P21E3
Cylinder 4 Injector B Circuit High
P21E3 is an OBD-II diagnostic trouble code meaning: Cylinder 4 Injector B Circuit High. Common causes: open injector control circuit, poor contact in the injector connector. Estimated repair cost: $17–89.
Symptoms
- Unstable engine idling
- Increased fuel consumption
- Reduced engine power
- Possible misfire in cylinder 4
- Check Engine Light Illuminates
Causes
- Open injector control circuit
- Poor contact in the injector connector
- Malfunction of the injector itself
- Wiring Harness Problems
- Engine control unit malfunction
How to Fix
- Check the resistance of injector B of cylinder 4
- Inspect connectors and wires for damage
- Check the integrity of the injector control circuit
- If necessary, replace the injector
- Check the operation of the engine control unit
Related codes
Error P21E3 by Vehicle Brand
FAQ
What does the P21E3 code mean?
P21E3 is an OBD-II diagnostic trouble code that indicates: Cylinder 4 Injector B Circuit High
What causes a P21E3 error code?
The most common causes of P21E3 include: Open injector control circuit; Poor contact in the injector connector; Malfunction of the injector itself; Wiring Harness Problems.
How do I fix a P21E3 diagnostic trouble code?
To fix P21E3: Check the resistance of injector B of cylinder 4. Inspect connectors and wires for damage. Check the integrity of the injector control circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21E3?
Yes, but get it checked soon
How much does it cost to fix P21E3?
The estimated repair cost for P21E3 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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