mopar dude

Hi John, I have not heard of the W-T ground reference modification? But I'll check that out tonight. I did start the truck when I got home tonight a few times, and the engine shut off with the key. I hope to work on the truck more on Sunday. I did notice, when I went to start it the first time when I got home, the temp gauge went to hot and the dash flashed p0121 and p1693. This is the first time I have noticed the dash flashing the codes up. After about 1or 2 minutes, the temp gauge dropped back down. When the temp gauge does this, that's when it sets a code and I have a dead gas peddle. Thanks again for sticking with me. Appreciate it.

Thank you for responding. Below are the answers to the questions. Please ask more if more clarification is needed. I appreciate the help. P0121 - Accelerator Pedal Position Sensor Signal Volts Do Not Agree w/Idle Validation Signal P0123 - Accelerator Pedal Position Sensor Signal Voltage Too High Any history on how many miles or age on the APPS? - I forgot to put that I have replaced the APPS also. Need more detail here. Does this happen immediately when the key is turn on or when the engine is started? - The issue is intermittent and happens when the key is turned on and engine is running. What is "hot"? - 200°...., 220°?..., pegged? - The needle pegs to max. Are any other gauges being affected when this happens? - No other gauges are being affected. Only temp gauge. Does this happen every time? - No, this happens intermittently How are you shutting the engine off when it does happen? - I have to put the truck in gear and stall it in order to turn it off. Please give more detail about the history of your truck (ownership, miles, problems, etc). I've owned the truck for over 10 years with no issues. Truck has 320k+ miles, ran good until this started happening last November. Did the 3 listed issues just start all at once , or come on gradually and separately? These issues came on all at once a few months back. Over time, the intermittent frequency has increased and gotten worse. How well does the engine run as far as performance on the road? - Truck has plenty of power apart from when these intermittent issues occur.

Hello everyone, I have a 2002 Dodge Ram 3500 24v manual that has an issue I can't seem to figure out. Hoping y'all can help a brother out. It has the following issues: 2 codes randomly: P0121 & P0123 Temperature gauge goes to hot The engine won't shut off with the ignition key. The following troubleshooting has been done: Checked engine wiring harness - no faults found. Had the PCM and ECM checked by 3rd party companies - no faults found Replaced injection pump Replaced alternator Replaced ignition switch Please feel free to ask me any questions. But really looking for some help as I'm at a loss of where to check next. Thanks!