Applicable Systems
OBD-II
Symptoms
An engine cylinder misfire has been detected. Rough running and increased emissions may result.
Possible Causes
- Ignition system component failure (spark plug, coil, or wire)
- Fuel injector not delivering fuel properly
- Mechanical issue affecting compression in the cylinder
Troubleshooting Steps
- Step 1: Inspect spark plugs and ignition coils for the affected cylinder
Faulty ignition component identified - Step 2: Test fuel injector operation and pulse
Injector operating correctly - Step 3: Perform compression test on the affected cylinder
Compression within specification
How to Reset
To reset: Clear the DTC after repairing the misfire cause and verify smooth idle.
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Source: SAE J2012 OBD-II Diagnostic Trouble Codes, SAE International
Category: OBD-II
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