DTC P0123: TP Sensor Input High: Condition

When engine is running, PCM monitors input voltage at terminal No. 89. If voltage is more than 4.9 volts, DTC is set. Causes may include the following:

• Faulty TP sensor.
• Open in Brown wire between TP sensor harness connector terminal No. 3 and PCM harness connector terminal No. 91.
• Short to power between TP sensor harness connector terminal No. 2 (White wire) and PCM harness connector terminal No. 89 (Brown/Yellow wire).
• Faulty connector or terminal at TP sensor or PCM.
• PCM malfunction.