What Does P250C Mean?
The ECM is receiving a voltage signal from the oil level sensor circuit that is lower than the expected minimum threshold. This indicates a short to ground or sensor internal failure.
Common Causes
40%
Shorted oil level sensor with internal circuit failure
30%
Wiring harness shorted to ground or damaged insulation
15%
Corroded sensor connector causing voltage drop
10%
Oil contamination in connector creating short circuit path
5%
ECM internal short on sensor input circuit
Diagnostic Steps
1
Step 1: Disconnect oil level sensor connector and measure voltage at ECM harness side; should read reference voltage (typically 5V)
2
Step 2: If voltage returns to normal with sensor disconnected, replace sensor
3
Step 3: If voltage remains low, inspect wiring for shorts to ground; check for pinched or damaged wires
4
Step 4: Perform continuity test from sensor signal wire to ground with harness disconnected
5
Step 5: Clean or replace sensor connector if oil contamination or corrosion is present
Estimated Repair Cost
$120 - $400
Parts + labor, varies by vehicle and location
The ECM is receiving a voltage signal from the oil level sensor circuit that is lower than the expected minimum threshold. This indicates a short to ground or sensor internal failure.
The most common cause of P250C (Engine Oil Level Sensor Circuit Low) is: Shorted oil level sensor with internal circuit failure
Typical repair costs for P250C range from $120 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Oil level monitoring system will not function properly, preventing low oil level warnings which could result in engine damage from oil starvation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P250C to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Engine Lubrication Monitoring
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
