P21E8
Cylinder 7 Injector B Circuit Low
P21E8 is an OBD-II diagnostic trouble code meaning: Cylinder 7 Injector B Circuit Low. Common causes: short circuit in the injector circuit, faulty injector of cylinder 7. Estimated repair cost: $28–89.
Symptoms
- Unstable engine operation
- Power Loss
- Increased fuel consumption
- Check Engine Light Is On
- Misfire in cylinder 7
Causes
- Short circuit in the injector circuit
- Faulty injector of cylinder 7
- Wiring harness damage
- Problems with injector connectors
- Engine control module malfunction
How to Fix
- Check the resistance of the injector of cylinder 7
- Inspect the wiring harness and connectors for damage.
- Check injector control circuit for short circuit
- Replace the faulty injector if necessary
- Check the operation of the engine ECU
Related codes
Error P21E8 by Vehicle Brand
FAQ
What does the P21E8 code mean?
P21E8 is an OBD-II diagnostic trouble code that indicates: Cylinder 7 Injector B Circuit Low
What causes a P21E8 error code?
The most common causes of P21E8 include: Short circuit in the injector circuit; Faulty injector of cylinder 7; Wiring harness damage; Problems with injector connectors.
How do I fix a P21E8 diagnostic trouble code?
To fix P21E8: Check the resistance of the injector of cylinder 7. Inspect the wiring harness and connectors for damage.. Check injector control circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21E8?
Limited driving only, diagnose soon
How much does it cost to fix P21E8?
The estimated repair cost for P21E8 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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