Disable a false TPMS warning after a head unit swap (Seat Ateca / VAG VCDS method)

The Problem

After replacing the factory MIB2 head unit with an aftermarket unit, a false low tyre pressure warning appeared repeatedly on the dashboard. Attempting to disable TPMS through Module 17 (Instrument Cluster) alone failed, with the setting reverting and triggering an "ECU miscoded" fault. The fix requires recoding the ABS module (Module 03) as well as the cluster. The procedure below was carried out on a 2017 Seat Ateca and is included as a VAG-platform reference — the exact coding values are specific to that car and must not be copied onto a VW T6/T6.1 van.

Solution

1. In VCDS, go to Module 03 (ABS) > Basic Settings and run "Reset tyre pressure monitoring display warnings" to clear the active TPMS warning. Simply clearing the fault code is not enough — the dashboard warning light will not go out without running this basic settings function.
2. Still in Module 03 (ABS), open Long Coding and navigate to Byte 27, then set Bit 3 to 0 and confirm Bits 4, 5, and 6 are also set to 0 to indicate no TPMS installed, then save the coding. Write the coding with the ignition on but the engine not running — the change will be rejected if the engine is idling.
3. Open Module 17 (Instruments) in VCDS, go to Long Coding, and set Byte 4, Bit 0 to 0 to disable the TPMS indicator in the cluster, then save.
4. Run a full VCDS autoscan to confirm no new fault codes have been introduced, and check that the TPMS warning light is extinguished.

Important — this does not transfer to vans: The byte/bit mapping above applies only to a 2017 Seat Ateca with ABS module 5Q0-614-517-AC (47-byte coding). VW T6 and T6.1 Transporters use different ABS modules with completely different coding maps, so these exact Byte/Bit positions and the 47-byte layout will not match and must not be reused. If you are working on a T6 or T6.1, identify your van's actual ABS and cluster part numbers via a VCDS autoscan first, then look up the coding map specific to that module (confirm which applies to your T6 generation before changing any coding). Do not copy the Ateca values across.