Cylinder 6 is located near the middle or rear of the engine block. The knock sensor monitors cylinder 6 during its power stroke. If it detects knocking, it delays ignition timing to protect the engine. If the knock continues, it sets this code. Bad fuel injectors, worn spark plugs, or vacuum leaks on the cylinder 6 intake runner are common causes.
Mechanic Glossary
6 Above Knock Threshold
A fault indicating that combustion vibrations in cylinder 6 exceed safe limits.
Frequently Asked Questions
The engine computer detected pre-ignition knocking in cylinder 6 that exceeded the safe operating noise limit.
Carbon buildup on the piston, a lean air-fuel ratio in cylinder 6, a bad spark plug, or low-octane fuel.
Swap the spark plug and coil pack, run a carbon clean, or inspect the fuel injector for blockages.