Powertrain, generic (extended)

P2D8E Engine Oil Pressure Sensor/Switch C Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

Some engines have more than one oil pressure sensor or switch; which one is labelled A, B or C is up to the manufacturer. P2D8E is the general circuit code for sensor or switch C: the controller sees an electrical fault, or with a digital SENT sensor a message or internal error, that it cannot classify as too low or too high. No manufacturer documents P2D8E publicly; Audi's EA888 evo5 does use a sensor C, but only its low fault P2D8F appears in a bulletin. The matching checks for sensor A are published: Ford's 2024 engines report an internal or communication fault of a SENT pressure sensor as P0520 within 5 s, and GM tests a plain switch while the engine has been stopped for a long time, setting P0520 as a Type C code without lamp if it still shows pressure for 5 s. Low and high are P2D8F/P2D90.

Likely causes

Oil-soaked, corroded or loose connector at sensor C
Internal electronics fault of the sensor or switch
Chafed or broken wire between sensor and engine control unit

Symptoms

  • Malfunction indicator lamp, depending on make
  • Oil pressure warning may come on without real pressure loss
  • Switchable oil pump may stay in its safe high-pressure stage

Repair estimate

DifficultyEasyDIY possible
Parts and labour€40–300
Time0.3–1.5 h

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

Parts involved

engine oil pressure sensor cwiring harnessecm

Related codes

P2D8FP2D90P2D91P0520P055A

References: fordservicecontent.com, gsi.ext.gm.com, static.nhtsa.gov.