Powertrain, generic (extended)

P2EC2 Turbocharger Compressor Outlet Temperature Sensor Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2EC2 flags a compressor outlet temperature that is electrically valid but does not fit the operating point. A reference is easy to build: Cummins (US6401457) derives the outlet temperature from inlet temperature and pressure, turbo speed, air mass and pressure ratio, and after a long soak the sensor should also agree with intake and ambient readings. Under 13 CCR 1968.2 CARB wants such two-sided checks (section (e)(15.2.1)) and, in (f)(7), a watch on charge air cooler performance, which relies on the temperature entering the cooler; Ford's diesel test P026A scales its limits with compressor outlet temperature. No manufacturer documents P2EC2. Typical causes are a slow, drifted or oil-coated sensor, or one that has worked loose in its port.

Likely causes

Sensor drifted or reacting too slowly
Tip coated with oil from crankcase or turbo seals
Sensor loose or not reaching into the air stream
Contact resistance at the connector

Symptoms

  • Check engine lamp after the fault is confirmed
  • Reading disagrees with intake and ambient temperature after a cold soak
  • Charge air cooler diagnosis may be suspended

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–350
Time0.5–2 h

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

Parts involved

turbo compressor outlet temp sensorwiring harnessecm

Related codes

P2EA6P2EC0P2EC1P2B71P026A

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