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Throttle Position Sensor Voltage Low

Name of Code:
Throttle Position Sensor Voltage Low

When Monitored:
With the ignition on.

Set Condition:
The TP sensor voltage at PCM cavity 35 goes below 0.15 volt.

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 cavity 35. The voltage is directly proportional to throttle angle. 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 cavity 61. The sensor ground is provided by PCM cavity 43.

Possible Causes:
- Sensor signal circuit shorted to ground
- Throttle position sensor failure
- Loss of 5-volt supply
- PCM failure
- Connector terminals
- Connector wires