got this 2002 SC430, just started last week while a stop the car goes to a low idle and check engine lite up and so as VSC, the code that came out on this is P1125 throttle control motor circuit ? i took it to a shop and diagnose it with a bad ECM which will be $3,300 for repair, I found SIA Electronics to send my ECM, has anyone use this vendor before?
looking for advise on this matter.

 

I dunno....it could be the actual throttle control motor or TPS.

Not sure I'd jump right to repairing the ECU.