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

P00AC Intake Air Temperature Sensor 1 Circuit Low Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

Intake air temperature sensor 1 for bank 2 measures the intake air temperature in the second intake path, typically near the air filter or in the air flow meter of that bank, on engines with two separate intake paths. For P00AC, 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

intake air temperature sensor 1 bank2intake air temperature sensor wiring

Related codes

P00AAP00ABP00ADP00AEP0112

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