Powertrain, generic · Fuel and air metering, auxiliary emission controls

P007B Charge Air Cooler Temperature Sensor Circuit Range/Performance Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

The charge air cooler temperature sensor (an NTC thermistor) measures the temperature of the compressed charge air at the charge air cooler, depending on the manufacturer upstream or downstream of it, and is often combined with the boost pressure sensor. The engine control module uses it for the air mass calculation, boost control, component protection and to monitor cooler efficiency. P007B is a plausibility check: at a start after a long standstill the sensor is compared with other temperature sensors such as intake air or coolant, which should then agree. Some systems also check while driving whether the reading stays implausibly high.

Likely causes

Sensor drifting or oil-coated and slow to respond
Wrong sensor fitted
Comparison sensor faulty
Charge air cooler efficiency or airflow impaired

Symptoms

  • Check engine light on
  • Reduced power possible, especially on diesels
  • Often no noticeable symptoms

Repair estimate

DifficultyEasyDIY possible
Parts and labour€80–250
Time0.3–1 h

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

Parts involved

charge air cooler temperature sensorcharge air cooler temperature sensor wiringboost pressure sensor

Related codes

P007AP007CP007DP011CP026A

References: law.cornell.edu, newtonnet.co.uk, gsi.ext.gm.com, static.nhtsa.gov.