EVAP and fuel tank
Evaporative emission leaks, purge and vent valves, tank pressure and fuel level sensing. Mostly a petrol-fleet concern.
15 documented codes across 46 real diagnostics.
Ranked by how often we actually see them
| Code | What it is | Diagnostics |
|---|---|---|
| P0441 | Evaporative emission system incorrect purge flow | 7 |
| P0443 | Evaporative emission system purge control valve circuit | 7 |
| P0456 | Evaporative emission system leak detected, very small leak | 5 |
| P049B | Not individually documented | 5 |
| P049C | Not individually documented | 5 |
| P2066 | Fuel level sensor B circuit range/performance | 3 |
| P0451 | Evaporative emission system pressure sensor range/performance | 3 |
| P0444 | Evaporative emission system purge control valve circuit open | 2 |
| P0440 | Not individually documented | 2 |
| P046C | Not individually documented | 2 |
| P0460 | Not individually documented | 2 |
| P0442 | Evaporative emission system leak detected, small leak | 1 |
| P0457 | Evaporative emission system leak detected, fuel cap loose or off | 1 |
| P0461 | Fuel level sensor A circuit range/performance | 1 |
| P2400 | Evaporative emission leak detection pump control circuit open | — |
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description
Are the public fault code pages built from my diagnostics?
They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.
Learn more: Fault code pages on wrenchlane.com (fault-code cluster)
Work a evap and fuel tank fault on a real car
Enter the codes and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.
Start free