Powertrain, generic (extended)

P2E54 Exhaust Pressure Sensor C Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2E54 is the general circuit fault of a third exhaust pressure sensor, C. Its position is set by the manufacturer; engines can carry several such sensors, as in a GE patent with one pressure sensor in each of two exhaust manifolds. No manufacturer publicly documents P2E54; Ford's 2023 diesels and its EcoBoost petrol engines use sensor A only. For that sensor Ford's diesel summary uses the general circuit code when the digital SENT sensor reports an error status or delivers raw data above a limit, while lost communication goes to U0691; for sensor C that is U069F. CARB's heavy-duty rule lists exhaust pressure sensors among monitored input components. Expect the MIL and, depending on use, limited boost or EGR. Low and High are P2E56 and P2E57.

Likely causes

Exhaust pressure sensor C failed internally
Wiring near the exhaust damaged by heat or chafing
Corroded or loose connector at sensor C

Symptoms

  • MIL on
  • Reduced power if boost or EGR control falls back to substitute values
  • Other exhaust or EGR monitors may not run

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–400
Time0.5–2 h

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

Parts involved

exhaust pressure sensor cwiring harnessecm

Related codes

P2E55P2E56P2E57U069FP0470P047A

References: fordservicecontent.com, image-ppubs.uspto.gov, static.nhtsa.gov, law.cornell.edu.