P00DDAmbient Air Temperature Sensor Circuit B Intermittent/Erratic
- 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
- Ambient air temperature sensor B is a second, separate ambient temperature circuit in addition to sensor A. What the second measuring point is used for in a given vehicle could not be documented; the value may be wired directly to the control module or come over the data bus. Regulations require monitoring of such inputs because ambient temperature is often an enabling condition for other diagnostics. None of the manufacturer documents searched uses these codes; the explanation follows sensor A. P00DD: The signal jumps or drops out briefly, which typically points to a loose contact.
- What you may notice
- Wrong or missing outside temperature display
- Climate control regulates incorrectly
- Check engine light on (manufacturer-dependent)
- Likely causes
- LikelySensor faulty (exposed to spray and stone chips)
- LikelyConnector corroded or wiring damaged, often after front-end work
- PossibleModule supplying the value over the data bus faulty
- RareControl module faulty
- 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: €50 – €150
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.