P2437 code meaning
AIR System Air Flow/Pressure Sensor Circuit Low (Bank 2)
Powertrain system Generic code P24xx codes Check engine light
What P2437 means
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.
P2437 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2437
- Check engine lamp
- Secondary air tests on both banks suspended
Common causes of P2437
- Most likelyBank 2 pressure sensor failed (Audi R8 bulletin replaces G610)
- PossibleSignal wire open or shorted to ground
- Less likely5 V supply to the sensor missing
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Air system flow sensor b2Sai wiring
What each part of P2437 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 37 | The exact fault in that area. |
What to do next
- Note P2437 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2437
What does P2437 mean?
P2437 means "AIR System Air Flow/Pressure Sensor Circuit Low (Bank 2)". P2437 reports a bank 2 secondary air pressure signal stuck below its valid range. It is a generic code, so it means the same on every make.
Is it safe to drive with P2437?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2437 fail an emissions test?
Yes, it can. P2437 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2437 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P2437 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.