What Does P250D Mean?
The ECM is detecting voltage on the oil level sensor circuit that exceeds the maximum expected threshold. This typically indicates an open circuit, short to power, or sensor internal failure.
Common Causes
40%
Open circuit in oil level sensor or sensor internal failure
30%
Broken wire or poor connection in sensor harness
15%
Sensor connector disconnected or corroded terminals causing open circuit
10%
Wiring shorted to battery voltage or another power source
5%
ECM internal fault with pull-up circuit stuck high
Diagnostic Steps
1
Step 1: Check that oil level sensor connector is fully seated and locked in place
2
Step 2: Measure voltage at sensor connector with key on; compare to specifications (typically 0.5-4.5V operating range)
3
Step 3: Disconnect sensor and measure resistance; infinite resistance indicates open sensor
4
Step 4: Check for continuity in wiring from sensor to ECM; repair any open circuits found
5
Step 5: Test for shorts to voltage by measuring sensor signal wire to B+ with connector disconnected
Estimated Repair Cost
$120 - $400
Parts + labor, varies by vehicle and location
The ECM is detecting voltage on the oil level sensor circuit that exceeds the maximum expected threshold. This typically indicates an open circuit, short to power, or sensor internal failure.
The most common cause of P250D (Engine Oil Level Sensor Circuit High) is: Open circuit in oil level sensor or sensor internal failure
Typical repair costs for P250D range from $120 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Oil level monitoring capability is lost; driver will not receive warnings of low engine oil which could lead to catastrophic engine failure if oil level drops.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P250D 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.
