P2432AIR System Air Flow/Pressure Sensor Circuit Low (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2432 means the bank 1 secondary air pressure signal has fallen below its valid band – typically a broken signal lead, a ground short or a missing 5 V reference. GM's tables give the limit as under 5 % of the reference (400 failed samples out of 1,000 on the 2005 3.8L V6) and, from 2018, under 6 % for 800 of 1,000 samples; the check runs all the time and is rated Type B. Volkswagen flags the code below 0.40 V on 2014 Beetle and Golf CBFA engines and below 0.5 V on the 2.5L five-cylinder. Because a dead signal makes every flow and valve test meaningless, those tests are suspended while the code is stored. The high-side twin is P2433, bank 2 uses P2437. Drivability is not affected.
- What you may notice
- Check engine lamp, also while driving warm
- Secondary air tests not run
- Other sensor codes if the shared 5 V line is affected
- Likely causes
- LikelySignal wire open or shorted to ground
- Possible5 V reference missing, often shared with other sensors
- PossiblePressure sensor failed internally
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.