Powertrain
generic / SAE
P033D
Knock/Combustion Vibration Sensor D Circuit High
Knock sensor D signal above upper plausibility — open signal or short to B+. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / 3D
Possible causes
- Open signal line high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 50–400 €
- Estimated time: 0.5–2 h
- Component: knock sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012