3450e3f2__WJ___Diagnostic_Trouble_Codes__ion_of_Diagnostic_Trouble_Code
[Scan Code] P0123 (M) [DRB Scan Tool Display] 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.
Jeep Grand Cherokee WJ - Diagnostic Trouble Codes
Description of Diagnostic Trouble Code