Minnesota Focus Owners Club

For a few years I have been getting a "TPS low input voltage" code. I have replaced the tps 3 times (with brand new parts) and have yet to get the code to go away. I feel that rules out any problem with the tps itself. So that leaves me with a problem in the wiring and/or programing in the ECU. I don't have my cd manual here right now (it's still at scotty's house). So I was wondering what shares the the same 5volt reference lead as the tps?

I'm guessing that whatever else is on that same reference is what is pulling too much voltage and causing my tps code (IAC if my under hood diagnosis is right).

I unplugged the IAC today and there is no idle change at all, hmmmm. BTW, I am running the 65mm FC tb, but I have reverted back to stock and still had the same problem.

Let me know what you think.


John

any refferance crkts will be at 5 volts, my geuss is that you take yer volt meter and check resstance back to the pcm. if the input volt is low you may have a crap wire or connector, i would try back probing the crkt. i think the resistance should be way low on the 5 volt crkt.