Powertrain, generic · Fuel and air metering, auxiliary emission controls
P00A9 Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank 2
Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo
Intake air temperature sensor 2 for bank 2 is the second air temperature sensor in the intake path of the second cylinder bank, for example in the intake manifold behind the charge air cooler on engines with two intake paths. For P00A9, the signal jumps faster than a real temperature can change, which typically points to a loose contact. No manufacturer description naming this exact code was found. Bank 2 codes occur only on engines with two separate intake or charge-air paths, one per cylinder bank.
Likely causes
Loose contact or wire broken by movement
Sensor failing intermittently
Interference on the signal wire
Symptoms
- Check engine light on
- Usually no noticeable symptoms
- Emissions test or readiness check may fail
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 2 bank2intake air temperature sensor wiring
Related codes
References: law.cornell.edu, newtonnet.co.uk, en.wikipedia.org.