P21E1
Cylinder 3 Injector B Circuit High
P21E1 is an OBD-II diagnostic trouble code meaning: Cylinder 3 Injector B Circuit High. Common causes: broken or damaged wires to the injector of cylinder 3, cylinder 3 injector malfunction. Estimated repair cost: $17–89.
Symptoms
- Unstable engine idling
- Misfire in cylinder 3
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Is On
Causes
- Broken or damaged wires to the injector of cylinder 3
- Cylinder 3 injector malfunction
- Poor contact in the injector connector
- Problems with injector relays
- Engine control unit (ECU) malfunction
How to Fix
- Check the integrity of the wiring to the injector of cylinder 3
- Check injector resistance (compare with other cylinders)
- Clean the contacts in the injector connector
- Check the voltage on the injector circuit
- If necessary, replace the injector or wiring harness
Related codes
Error P21E1 by Vehicle Brand
FAQ
What does the P21E1 code mean?
P21E1 is an OBD-II diagnostic trouble code that indicates: Cylinder 3 Injector B Circuit High
What causes a P21E1 error code?
The most common causes of P21E1 include: Broken or damaged wires to the injector of cylinder 3; Cylinder 3 injector malfunction; Poor contact in the injector connector; Problems with injector relays.
How do I fix a P21E1 diagnostic trouble code?
To fix P21E1: Check the integrity of the wiring to the injector of cylinder 3. Check injector resistance (compare with other cylinders). Clean the contacts in the injector connector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21E1?
Yes, but get it checked soon
How much does it cost to fix P21E1?
The estimated repair cost for P21E1 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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