Throttle Position Sensor Voltage High (OBD II)

Name of Code:
Throttle Position Sensor Voltage High

When Monitored:
With the ignition on, and battery voltage above 10.4 volts.

Set Condition:
TP sensor voltage at PCM goes above 4.9 volts for 3.2 seconds.

Theory of Operation:
The throttle position sensor contains a potentiometer that is operated by the throttle blade shaft. As the throttle plate rotates, the TP sensor provides a variable 0 to 5-volt signal to PCM. The voltage is directly proportional to throttle angle. When the throttle plate is at rest, the voltage is low. When the throttle is fully open, the voltage is high. With this signal, the PCM can determine precise throttle position under all operating conditions. The TP sensor receives a 5-volt supply from PCM. The sensor ground is provided by PCM.

Possible Causes:
- Sensor signal circuit open
- Throttle position sensor failure
- Sensor ground circuit open