P1333
Knock Sensor 4 High Input
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Reduced engine power
- Increased fuel consumption
- Detonation knocks in the engine
- Check Engine Light Is On
- The engine goes into emergency mode
Causes
- Cylinder 4 knock sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Mechanical problems in the engine (detonation)
- ECU malfunction
How to Fix
- Check the continuity of the knock sensor circuit
- Check the sensor connector and contacts
- Replace cylinder 4 knock sensor
- Check the engine for detonation
- Check and, if necessary, replace the computer