DTC P1125: Throttle Position (TP) Sensor: Condition

DTC indicates TP signal went less than 0.49 volt or greater than 4.60 volts sometime during the last 80 drive cycles. Possible causes for this fault are:

Faulty TP sensor wiring harness or connector.
Faulty TP sensor.

Continuous Memory Code P1125

Ensure scan tool is connected to DLC. Start engine and allow to idle. Increase engine speed to 1500 RPM for 5 seconds and return to idle. Using scan tool, access TP PID. While observing PID, lightly tap on TP sensor to simulate road shock. Wiggle sensor connector and wiring harness. If TP PID reading stays within normal operating range (0.49-4.60 volts), go to next step. If TP PID reading goes out of range, replace TP sensor.

Check Wiring Harness Between TP Sensor & PCM

Turn ignition off. Disconnect PCM 104-pin connector. Inspect connector for damage and repair as necessary. Install Breakout Box (014-00950). Connect PCM to breakout box. Connect DVOM between test pins No. 89 (TP) and 91 (SIG RTN). While observing DVOM, wiggle small sections of wiring harness starting at TP sensor and going to PCM. If DVOM reading stays within normal operating range (0.49-4.60 volts), problem is intermittent and cannot be identified at this time. Ensure all applicable connections are clean and tight, and go to DIAGNOSTIC TEST Z (INTERMITTENT) . If DVOM reading goes out of range, isolate fault and repair as necessary. Clear PCM memory and repeat QUICK TEST. See TESTS W/CODES - INTRODUCTION article.