P0099low severityPowertrain
Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic
on 2011 Audi Q7 3.0L Supercharged V6 · AWD
What this code means
The second intake air temperature sensor signal is dropping out or jumping around. Intermittent faults often come from wiring or connector issues.
Symptoms
- Intermittent check engine light
- Occasional rough running
- Fluctuating fuel economy
Common causes
- Loose or corroded connector
- Chafed or intermittent wiring
- Faulty intake air temperature sensor 2
- Faulty PCM
Diagnostic steps
- Monitor IAT2 reading while wiggling wiring
- Inspect connector for corrosion
- Check wiring harness for chafing
- Replace sensor or repair wiring
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