P2436 code meaning
AIR System Air Flow/Pressure Sensor Circuit Range/Performance (Bank 2)
Powertrain system Generic code P24xx codes Check engine light
What P2436 means
P2436 says the bank 2 secondary air pressure reading is electrically valid but does not match what the system expects. Audi documents the code on the 2017 R8 and R8 Spyder V10: bulletin 2049142 (TSB group 01, 18-56) pairs P243600 with P243700 and has the bank 2 pressure sensor G610 replaced, following the guided fault finding. GM's 2018 tables note that the barometric-quality weighting used for P2431 also applies to P2436, but only on engines with two valves. As on bank 1, the reading is usually compared with ambient pressure with the pump off and on; a drifting sensor, a clogged sensing port or a wrong baro value can all trip it. P2431 is the bank 1 code; P2437/P2438 are the electrical faults.
P2436 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 repairAfter a drive cycle
Symptoms of P2436
- Check engine lamp
- Often stored together with P2437
- Secondary air readiness incomplete
Common causes of P2436
- Most likelyBank 2 pressure sensor drifted or failed (Audi R8 replaces G610)
- PossibleSensing port or hose on bank 2 clogged or leaking
- Less likelyWrong barometric reference value
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 P2436 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). |
| 36 | The exact fault in that area. |
What to do next
- Note P2436 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 P2436
What does P2436 mean?
P2436 means "AIR System Air Flow/Pressure Sensor Circuit Range/Performance (Bank 2)". P2436 says the bank 2 secondary air pressure reading is electrically valid but does not match what the system expects. It is a generic code, so it means the same on every make.
Is it safe to drive with P2436?
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 P2436 fail an emissions test?
Yes, it can. P2436 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 P2436 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P2436 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.