I have changed the TPS with a new one and cables/connections look and test fine. I cleared the code, the problem still occurs but only when turning on the a/c. The a/c compressor works fine. The a/c system has a low charge but no trouble code shows for same. No other trouble codes are stored or show when the vehicle is run without a/c.
Why does the DTC P0123 for "TPS voltage high" come on when I turn on the A/C? on 2001 Dodge Ram 2500
by Daktari77 in Potwin, KS on June 27, 2014
ANSWER by pushrod on June 27, 2014
Professional scanner needed to view live data.... Can watch actual TPS readings!