P21E9
Cylinder 7 Injector B Circuit High
P21E9 is an OBD-II diagnostic trouble code meaning: Cylinder 7 Injector B Circuit High. Common causes: cylinder 7 injector malfunction, open or short circuit in the injector control circuit. Estimated repair cost: $28–89.
Symptoms
- The engine hesitates or runs rough
- Loss of engine power
- Increased fuel consumption
- Check Engine Light Is On
- Possible misfires
Causes
- Cylinder 7 injector malfunction
- Open or short circuit in the injector control circuit
- Problems with the injector connector
- Engine control module (ECU) defective
- Corroded contacts or damaged wiring harness
How to Fix
- Visual inspection of the injector control circuit
- Checking the resistance of the injector of cylinder 7
- Diagnostics of voltage in the control circuit
- Replacing a faulty injector if necessary
- Repair or replacement of damaged electrical wiring
Related codes
Error P21E9 by Vehicle Brand
FAQ
What does the P21E9 code mean?
P21E9 is an OBD-II diagnostic trouble code that indicates: Cylinder 7 Injector B Circuit High
What causes a P21E9 error code?
The most common causes of P21E9 include: Cylinder 7 injector malfunction; Open or short circuit in the injector control circuit; Problems with the injector connector; Engine control module (ECU) defective.
How do I fix a P21E9 diagnostic trouble code?
To fix P21E9: Visual inspection of the injector control circuit. Checking the resistance of the injector of cylinder 7. Diagnostics of voltage in the control circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21E9?
Limited driving only, diagnose soon
How much does it cost to fix P21E9?
The estimated repair cost for P21E9 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat