P2533
From Ross-Tech Wiki
18965/P2533/009523 - Ignition Switch; Run/Start Position Circuit: Open or Short to Ground
Special Notes
When found in the 4F chassis Audi A6:
- See https://forums.ross-tech.com/showthread.php?6433-Case-Study-2007-A6-crank-no-start-P2533
- Check the terminal 50 (Starter solenoid signal) wire from terminal 8/87 of the J53 relay -to- T17a/16 for damage in the E-Box. If that wire is OK make sure the starter cranks when bypassing the J53 relay before tracing the Black/Red wire to the Engine controller.
When found in any other Audi using a similar 2-relay (J53 and J695) Starter system verify the wiring diagram matches the above notes before removing the wipers and opening the E-box.