P252B

Engine Oil Quality Sensor Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Incorrect oil condition readings
Reduced engine power
Increased fuel consumption
Unstable engine operation

Causes

Oil quality sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with the engine control unit
Heavy contamination of engine oil

How to Fix

Check the condition of the engine oil and replace if necessary
Check the integrity of the sensor circuit and connectors
Test the oil quality sensor
Replace the sensor if a fault is detected
Check and update ECU software if necessary

Related codes

P252A P252C P252D