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.
Low severity. Can I keep driving?Yes, you can keep driving, though it should be repaired: the car pollutes more at startup and may not pass an inspection.
Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.
Symptoms
- Check engine lamp
- Secondary air tests on both banks suspended
Most likely causes
- Bank 2 pressure sensor failed (Audi R8 bulletin replaces G610)
- Signal wire open or shorted to ground
- 5 V supply to the sensor missing
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P2437 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 4: Emissions
- 37: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2437?
Yes, you can keep driving, though it should be repaired: the car pollutes more at startup and may not pass an inspection.
What causes code P2437?
The most common causes are: bank 2 pressure sensor failed (Audi R8 bulletin replaces G610); signal wire open or shorted to ground; 5 V supply to the sensor missing.
Related codes
- P2432AIR System Air Flow/Pressure Sensor Circuit Low (Bank 1)
- P2435AIR System Air Flow/Pressure Sensor Circuit (Bank 2)
- P2436AIR System Air Flow/Pressure Sensor Circuit Range/Performance (Bank 2)
- P2438AIR System Air Flow/Pressure Sensor Circuit High (Bank 2)
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.