Hi all,

Im working on a 1999 s70 non-turbo that is currently in limp mode. I replaced the TPS sensor by disassembling the ETM. I also cleaned the throttle plate and throat. Fairly sure I did it properly (I repair electronics). I also pulled apart the potentiometer out of the old unit and it DID have the scratches/physical damage that would indicate that was faulty.


The car runs better, but still idles rough and has the ETS light on. Not sure how to reset that. These are the codes it threw before I cleared them as read by my OBDII scanner, which may have been left over pre-ETM rebuild:

P1620 - MIL REQUESTED BY ETS
P1017 - ECM fail?
P1019 - P1019=ECM-902A Throttle unit communication, Faulty signal
P1020 - P1020=ECM-902B Throttle unit communication, Faulty signal
P1021 - P1021=ECM-903F Throttle unit, Faulty signal
P1043 - P1043=ECM-9520 Accelerator pedal (AP) position sensor, Faulty signal
P1054 - no speed ABS
P1057 - TCU request CEL
P1059 - P1059 MIL requested by the throttle unit
P1108 -

This is what i could find by googling. Still waiting for the codes to reset after reinstalling the ETM. He'd said the speedo was intermittent, but then seemed to work just now when we test drove.

I plan on pulling the abs unit and resoldering connection points next, as well as hunting for vacuum leaks.

Any idea where else to look? There was a small vacuum hose that I just figured out goes from the top of the air cleaner to the bottom that had come off- could that cause any of these conditions?

thanks, Carissa