Cylinder 5 Ion Current Sense Circuit Range/Performance
The ion current signal from cylinder 5 is outside the expected range for combustion conditions. Combustion quality cannot be assessed reliably.
Affected components
- Spark plug cyl 5
- Ignition coil cyl 5
- Ion sense module
Common causes
- High likelihood: Spark plug aged - electrode shape changed
- Medium likelihood: Ion sense circuit gain drift
- Low likelihood: Sensor element aged beyond calibration window
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.