Should be about .40v or.42v at idle. Make sure the plug is clean & tight. Try resetting the TPS. If no change in volt reading when you adjust it, I would say somethings bad.
Originally posted by talstar Reset at around .45 and its still saying to low voltage. I guess its bad. The car surges at the top end of each gear, would the tps cause this?
When you get the TPS set at idle to around .42 volts, then RESET the ECM (orange wire by the battery). That should reset the code, unless there's a hard failure of the TPS (or the circuit to the ECM or the ECM itself).
For some tips on resetting the TPS and IAC, look at: