P252D

Engine Oil Quality Sensor Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Incorrect oil change interval readings
Reduced engine power (in rare cases)
Floating idle speed

Causes

Oil quality sensor malfunction
Open or short circuit in the sensor circuit
Oxidation of contacts in the sensor connector
Problems with the engine control unit
Low or heavily contaminated engine oil

How to Fix

Check the level and condition of the engine oil
Inspect the connector and wiring of the oil quality sensor
Check the sensor resistance with a multimeter
Replace the oil quality sensor if necessary
Reset the error and check the system operation

Related codes

P252C P252E P0520