Powertrain
generic / SAE
P252B
Engine Oil Quality Sensor Circuit Range/Performance
The oil quality sensor is electrically intact, but the readings do not match the model — for example permittivity that does not change after an oil change, or shifts inconsistent with km/h driven. Often a contaminated electrode or oil that does not fit the sensor calibration.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 2B
Possible causes
- Contaminated sensor electrode high
- Oil grade outside the sensor calibration range medium
- Sensor element aged beyond calibration window low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–600 €
- Estimated time: 0.5–2 h
- Component: oil quality sensor
- Component: engine oil
Sources
References
sae:J2012