Cylinder 4 - Fuel Trim at Max Limit
Per-cylinder fuel trim on cylinder 4 has reached its maximum correction limit. Cylinder running too lean structurally.
Affected components
- Injector cyl4
Common causes
- High likelihood: Injector clogged on cylinder 4
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.