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Symptom: P0123-THROTTLE POSITION SENSOR VOLTAGE HIGH When Monitored and Set Condition: P0123-THROTTLE POSITION SENSOR VOLTAGE HIGH When Monitored: With the ignition on and battery voltage above 10.4 volts. Set Condition: Throttle Position Sensor voltage at the PCM goes above 4.5 volts for 3.2 seconds. POSSIBLE CAUSES THROTTLE POSITION SENSOR SWEEP INTERMITTENT CONDITION THROTTLE POSITION SENSOR SIGNAL CIRCUIT SHORTED TO 5 VOLT SUPPLY CIRCUIT THROTTLE POSITION SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE THROTTLE POSITION SENSOR INTERNAL FAILURE SENSOR GROUND CIRCUIT OPEN THROTTLE POSITION SENSOR SIGNAL CIRCUIT OPEN PCM TEST ACTION APPLICABILITY 1 NOTE: Ensure the throttle is fully closed and free from binding or carbon t, read the Throttle Position Sensor voltage. Is the voltage above 4.5 volts? All Yes → No → 2 Turn the ignition off. All Yes → Repair the Throttle Position Sensor Signal circuit for a short to No → 93 DRIVEABILITY - GAS |