Powertrain, generic (extended)

P250C Engine Oil Level Sensor Circuit Low

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

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.

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

Symptoms

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

Repair estimate

DifficultyMediumDIY possible

Parts and labour€0–400

Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

oil level sensorsensor wiring

Related codes

P250A P250D P250E

References: static.nhtsa.gov, serdia.deutz.com, hella.com.