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P2122 Throttle Position Sensor D Circuit Low Input

Technical Description

Throttle/Pedal Position Sensor/Switch "D" Circuit Low Input

What does that mean?

This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model.

A P2122 code means that the the car's computer has detected that the TPS (throttle position sensor) is reporting too low a voltage. On some vehicles that lower limit is 0.17 - 0.20 volts (V). The "D" refers to a particular circuit, sensor, or area of a particular circuit.

Did you adjust it when you installed it? If the signal value is less than .17V then the PCM sets this code. Could be an open or a short to ground in the signal circuit. Or you may have lost the 5 Volt reference voltage.


Symptoms may include:


A code P2122 may mean that one or more of the following has happened:

Possible Solutions

Some recommended troubleshooting and repair steps are:

Related P2122 DTC Discussions

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