Aaaalso It’s about a 98 V70 / 144PS / automatic with TRACS (again the daughter) The ABS error concerns me and also parts of you for quite a while. It all started with it, and the error is still today so that the ABS and the Tracs lamp sporadically went on (mistake read out, sensors at the back both exchanged, are now new). Then first the ECU (9162675 / Tracs) against the the forum control unit (9140773 / no Tracs) replaced. Error away. So my St. When I put it back in, the error 431 came (translated: General error in the ABS control unit). I Googled it all once and found out: Error code 431 means: “Inlet valve back right” “open circuit or short circuit” I can’t do anything with it. Can it be due to the different control units? One with, the other without Tracs. Can someone tell me what that means and how to continue with the error search now? e Measures: 1) Let the control unit solder. 2) Exchanged ABS sensors at the rear (after that the error sensor at the rear could no longer be detected). 3) Examines the plug contacts in a precise manner, uses no eye-catching contact spray. 4) Plugs tested for a fixed seat (locking is correctly hooked in) 5) Both control units are read out immediately after installation and all errors are deleted. I am grateful for any suggestion. Greetings Thomas