97 Jeep Cherokee p0123

P0123 (M) Throttle/Pedal Position Sensor/Switch A Circuit Intermittent Throttle position sensor input above the maximum acceptable voltage. Follow all appropriate diagnostics for the fault that is present. Prior to replacing parts, check all connectors between the speed control switch and the PCM for moisture Internally the PCM uses the same A/D (analog to digital) converter for TPS voltage as it does for the speed control switch sense. If the v-37 circuit has voltage bleed over from another source, a code of TPS Shorted to voltage may be set in the PCM. The DN model equipped with rear heat option, has an external water pump to circulate coolant to the rear heater. If you find coolant in the bulkhead connector, the likely cause would be a leaking coolant pump. Pump should be replaced if found leaking. If the code sets when the A/C is turned on go right to the bulk head connector and check for moisture. Check for a shorted clock spring causing the speed control 5 volt feed to be shorted to power. It's not also something simple the switch on the dash that limits the shift points for pulling a trailer, is it? AW4 Jeep Diagnoses:

"partsmore" wrote in message news: snipped-for-privacy@localhost.talkaboutautos.com...

Danger, Will Robinson!

Hughes Link approaching.

Beware! Beware!

We checked and cleaned all connectors also yesterday, still have light and code - unable to erase?

Disconnect the battery for a while to erase codes.

Mike