Powertrain
generic / SAE
P252A
Engine Oil Quality Sensor Circuit
General electrical fault on the engine oil quality sensor — typically a capacitive/dielectric sensor that estimates oil aging from permittivity, viscosity proxies and conductivity. With no valid reading the dynamic service-interval algorithm falls back to the fixed-interval default.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 2A
Possible causes
- Open or shorted wiring to the sensor high
- Failed sensor electrode after long use medium
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–600 €
- Estimated time: 0.5–2 h
- Component: oil quality sensor
- Component: sensor wiring
Sources
References
sae:J2012