P0AADHybrid/EV Battery Pack Air Temperature Sensor A Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0AAD is the plausibility check for battery air temperature sensor A: the signal is electrically valid but does not fit other temperatures. GM documents two methods. In the 2011 and 2013 full-size two-mode hybrid tables, at power-up the inlet air reading may not exceed the outlet air reading by more than 20 °C, checked once per start. In GM's 2013 table (13OBDG05C), after more than 8 hours off the inlet sensor may not differ from the average battery core temperature by more than 10 °C, 50 of 62 samples. Both are Type B, two trips. A sensor stuck at a plausible value, a sensor out of the air stream or a faulty core sensor can cause it. The car keeps running, but fan control and power limits may be wrong.
- What you may notice
- Check engine or hybrid warning light
- Battery cooling fan behaves unusually
- Likely causes
- LikelyThermistor drifted or stuck at a plausible value
- PossibleSensor displaced from the air stream or duct blocked
- RareFault in the comparison sensor (outlet air or cell temperature)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.