Powertrain, generic (extended)

P2EBC Crankcase Temperature Sensor Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2EBC means the crankcase temperature sensor delivers an electrically valid value that does not suit the engine state: it may stick, react too slowly or sit far from the coolant and oil temperatures after a long stop. The CARB rule 13 CCR 1968.2 calls in (e)(15.2.1) for rationality checks that catch readings that are wrongly high as well as wrongly low. Why the value must be right is shown by patents: Ford (US9394843) uses an oil temperature sensor on the crankcase as a gate for purging fuel from diluted oil, and a hydrogen-engine application (US20230313750) compares crankcase gas temperature with the blow-by dew point to decide how much air prevents water condensing. No manufacturer documents P2EBC. Electrical faults use P2EBB, P2EBD and P2EBE.

Likely causes

Sensor drifted or slow because of sludge or oil coking on the tip
Contact resistance in the connector shifting the value
Replacement sensor with a different characteristic fitted

Symptoms

  • Check engine lamp after the fault is confirmed
  • Crankcase reading disagrees with oil and coolant temperature on a cold start
  • Crankcase ventilation checks may not complete

Repair estimate

DifficultyEasyDIY possible
Parts and labour€50–300
Time0.3–1.5 h

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

Parts involved

crankcase temperature sensorwiring harnessecm

Related codes

P2EBBP2EBDP2EBEP0196

References: law.cornell.edu, image-ppubs.uspto.gov, image-ppubs.uspto.gov.