P2437AIR System Air Flow/Pressure Sensor Circuit Low (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2437 reports a bank 2 secondary air pressure signal stuck below its valid range. Audi lists it for the 2017 R8 and R8 Spyder, where it often shows up together with P2436; the bulletin's remedy is a new bank 2 pressure sensor G610. GM's 2018 tables name P2437 as a blocking condition for the bank 1 sensor tests, so a low reading on either side halts the whole secondary air diagnosis. Electrically, the usual suspects are an interrupted signal line, contact with ground or no 5 V supply; GM's bank 1 sensor treats a voltage under about 5–6 % of the reference as faulty, which gives an idea of the scale. Driving is not affected, but the secondary air readiness stays open. P2438 is the high-side code.
- What you may notice
- Check engine lamp
- Secondary air tests on both banks suspended
- Likely causes
- LikelyBank 2 pressure sensor failed (Audi R8 bulletin replaces G610)
- PossibleSignal wire open or shorted to ground
- Rare5 V supply to the sensor missing
- 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 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.