P0123

Tests 1 - 2:

Tests 3 - 6:

Tests 7 - 12:

SYMPTOM
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
- TPS voltage change not smooth
- TPS connectors/harness intermittent problem (D)
- TPS harness/connectors intermittent problem (C)
- TPS harness/connectors observable problem
- TPS ground circuit open
- TPS signal or S/C switch signal circuit shorted to voltage
- TPS signal circuit open
- TPS signal circuit shorted to 5 volt supply circuit
- Throttle Position Sensor (voltage < 1.0 volt)
- Transmission Control Module (if equipped)
- Powertrain Control Module