P2024 code meaning
EVAP Fuel Vapor Temperature Sensor Circuit
Powertrain system Generic code P20xx codes Check engine light
What P2024 means
The fuel vapor temperature sensor tells the ECM how warm the vapor in the tank and canister is, which matters for leak tests that judge pressure or vacuum as the fuel cools after shutdown. P2024 is the unspecified electrical code for that circuit. On recent Audi models the sensor is built into the leak detection unit J909 at the charcoal canister. An Audi bulletin first issued in 2023 and revised in September 2026 covers 2022–2025 A3 to Q8 models: four-cylinder engines could store P2024, described as an electrical fault of the tank breather temperature sensor, although guided diagnosis expects P2026 for a low voltage at J909. The fix there is to follow the corrected test, not to replace parts. Without valid temperature the EVAP leak test cannot complete.
P2024 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2024
- Check engine lamp on
- EVAP readiness not set, possible inspection failure
Common causes of P2024
- Most likelyOpen or shorted wiring to the temperature sensor or leak detection unit
- PossibleMisassigned fault entry in the ECM software (Audi 2022–2025)
- PossibleLeak detection unit with integrated sensor faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EVAP fuel vapor temp sensorEVAP leak detection moduleEVAP harness
What each part of P2024 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 24 | The exact fault in that area. |
What to do next
- Note P2024 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 P2024
What does P2024 mean?
P2024 means "EVAP Fuel Vapor Temperature Sensor Circuit". The fuel vapor temperature sensor tells the ECM how warm the vapor in the tank and canister is, which matters for leak tests that judge pressure or vacuum as the fuel cools after shutdown. It is a generic code, so it means the same on every make.
Is it safe to drive with P2024?
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 P2024 fail an emissions test?
Yes, it can. P2024 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 P2024 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2024 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.