Injector Circuit - Cylinder 9
The P0286 code means the vehicle's onboard diagnostic system has detected: Injector Circuit - Cylinder 9. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $150 - $700 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Engine misfire on cylinder 9
- Rough running
- Reduced power
Probable Causes (Ranked by Likelihood)
- Faulty fuel injector on cylinder 9 Very High
- Wiring damage to cylinder 9 injector High
- Corroded injector connector Moderate
- PCM driver failure Low
Step-by-Step Diagnostic Procedure
-
Check for additional misfire codes.
-
Measure cylinder 9 injector resistance.
-
Inspect wiring and connector.
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Swap injector to diagnose.
Frequently Asked Questions
What engines have a cylinder 9?
V10 engines (like the Ford 6.8L, Dodge 8.0L, and Audi/Lamborghini 5.2L) and V12 engines have cylinders numbered 9 and above.
Is P0286 rare?
Yes, P0286 is uncommon because V10 and V12 engines are far less common than V6 and V8 engines.
Do the same diagnostic steps apply?
Yes, the diagnostic approach for cylinder 9 injector circuits is identical to lower-numbered cylinders.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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