P250C: Engine Oil Level Sensor Circuit Low

P250C means the oil level sensor's signal line is pulled too low, the classic picture of a short to ground or, depending on the input design, a break that lets the line drop. Deutz describes its P250C-00 the same way: level sensor line grounded or interrupted. Hyundai shows that software can trip it too: on 2023 Kona and Elantra with the 2.0 L Nu Atkinson engine, P250C turned on a warning lamp, and the cure was a PCM reflash that changes how the oil level warning is triggered. Ford also lists P250C for the 2014 BOSS 302S engine module. The opposite fault is P250D, dropouts are P250E. A low level of oil itself is P250F. For the driver the oil level information is lost.

High severity. Can I keep driving?If the red oil warning light comes on, stop the car in a safe place and turn off the engine. Do not continue until you have confirmed the level and pressure.

Symptoms

Oil level warning lamp on
No oil level reading in the cluster

Most likely causes

Signal wire shorted to ground near the sump
Open circuit or unplugged sensor connector
Warning logic in the engine module, fixed by reflash (Hyundai 2.0 Nu)
Sensor electronics shorted internally

What to check, in order

Start with the simplest. You can tick off each step.

Stop and check the level with the dipstick or the car's menu
With the connector unplugged, check whether the signal wire is making contact with ground.
Check for leaks and inspect the sensor's connector
Measure the actual pressure with a gauge
Check the valve or pump according to the manual

Good to know

Repair difficulty: medium

What each character of P250C means

P: Powertrain: engine and transmission
2: Generic code: same on every make
5: Speed and idle
0C: Specific fault in that system

Frequently asked questions

Can I keep driving with code P250C?

If the red oil warning light comes on, stop the car in a safe place and turn off the engine. Do not continue until you have confirmed the level and pressure.

What causes code P250C?

The most common causes are: signal wire shorted to ground near the sump; open circuit or unplugged sensor connector; warning logic in the engine module, fixed by reflash (Hyundai 2.0 Nu).

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.