U05A0Invalid Data Received From Evaporative Emission System Leak Detection Control Module
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Some fuel systems hand the tank leak test to a separate module with its own pump, valve, pressure sensor and processor. Stoneridge patent US11773809 describes such a unit: it wakes hours after shutdown while the engine controller sleeps, runs the test alone and later passes pressure results over CAN or LIN, from which the OBD system decides on a fault code. U05A0 is set when those reports arrive but cannot be trusted, for example wrong length, counter or values. Ford's 2014 OBD code list shows it with the lamp indicator. CARB 1968.2 requires leak detection down to 0.020 inch on gasoline vehicles, so a module whose data are rejected leaves the EVAP readiness open. U029F means no messages at all, U030A a software mismatch. Driving is unaffected.
- What you may notice
- Check engine light on
- EVAP readiness not set, emissions inspection may fail
- Likely causes
- PossibleLeak detection module electronics or its pressure sensor failing
- PossibleCorrosion at the module connector near the tank or canister
- RareModule and engine controller software levels do not match
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.