P2199Intake Air Temperature Sensor 1/2 Correlation
- 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
- P2199 compares two intake air temperature readings that should be close, typically one in the air mass sensor and one further downstream in the intake manifold or a combined pressure and temperature sensor. Each circuit can be fine on its own; the fault is the disagreement. GM sets it when the two values differ by more than 55 °C in 40 of 50 samples taken every 100 ms, as a Type B code with MIL after two trips (2016 and 2018 tables). VW's 2014 Touareg uses a much tighter limit of 10 °C between the two manifold temperatures. CARB requires such rationality checks for input sensors under (e)(15). Stellantis lists it among the codes addressed by a PCM update for the 2020 RAM 1500 with the 3.0 EcoDiesel V6; there, check the software level first. Circuit faults are P0111 to P0114 (sensor 1) and P0096 to P0099 (sensor 2).
- What you may notice
- Check engine light on
- Usually no noticeable driveability change
- Scan data shows two clearly different intake temperatures with the engine cold-soaked
- Likely causes
- LikelyOne temperature sensor drifted or contaminated
- PossibleCorroded connector or added resistance in one sensor circuit
- PossibleCalibration issue fixed by a PCM update (e.g. RAM 1500 3.0 EcoDiesel 2020)
- RareStrong heat soak or hot-air leak near one sensor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.