Powertrain, generic (extended)

P2EC0 Turbocharger Compressor Outlet Temperature Sensor Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2EC0 reports that the compressor outlet temperature signal has fallen under the lowest valid voltage. Air temperature sensors on the intake side are usually NTC thermistors, as Bosch states for its combined boost pressure and temperature sensor; their resistance shrinks as they warm, so a signal pulled towards ground is read as extreme heat. A signal wire touching ground or a sensor shorted internally is the usual cause. With a PTC element the meaning would be reversed. No manufacturer documents P2EC0, so thresholds and timing are unknown. Section (e)(15.2.1) of California's 13 CCR 1968.2 has the low fault stored apart from the high one (P2EC1). In GM's patent US11060525 a faulty sensor switches the closed-loop boost reduction off.

Likely causes

Signal wire shorted to ground, e.g. chafed on the charge pipe
Sensor shorted internally
Oil or moisture bridging the connector pins

Symptoms

  • Check engine lamp on
  • Live data shows an implausibly hot charge air temperature
  • Possible loss of power if a substitute value limits boost

Repair estimate

DifficultyEasyDIY possible
Parts and labour€60–300
Time0.3–1.5 h

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

Parts involved

turbo compressor outlet temp sensorwiring harnessecm

Related codes

P2EA6P2EC1P2EC2P2B6F

References: bosch-mobility.com, en.wikipedia.org, law.cornell.edu, image-ppubs.uspto.gov.