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

P00A2 Charge Air Cooler Temperature Sensor Circuit Low Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

The charge air cooler temperature sensor for bank 2 (an NTC thermistor) measures the charge air temperature in the second charge-air path, for example on V engines with two charge air coolers. The engine control module uses it for the air mass calculation, boost control and component protection. For P00A2, the sensor signal is below its valid range. With the usual voltage-type NTC sensor this means a short to ground, and the control module reads an extremely high temperature; some manufacturers use sensors with a frequency output, where a low signal instead corresponds to an extremely low temperature (open circuit or short to ground). Bank 2 codes occur only on engines with two separate intake or charge-air paths, one per cylinder bank.

Likely causes

Sensor shorted internally or signal wire shorted to ground
Connector damp or corroded
On frequency-output sensors: open circuit
Engine control module faulty

Symptoms

  • Check engine light on
  • Usually no noticeable symptoms
  • Slightly changed power or knock control with an implausible reading

Repair estimate

DifficultyEasyDIY possible
Parts and labour€40–250
Time0.3–2 h

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

Parts involved

charge air cooler temperature sensor bank2charge air cooler temperature sensor wiring

Related codes

P00A0P00A1P00A3P00A4P007C

References: law.cornell.edu, static.nhtsa.gov, en.wikipedia.org.