P0122 — Throttle Position Sensor Low Voltage
| Meaning | The engine computer has detected an electrical signal from the throttle position sensor that is lower than the expected baseline. This sensor tells the computer how far down your foot is pressing the gas pedal, so a low reading means the system is not getting accurate throttle data. |
| Family | Powertrain (P) |
Typical symptoms
The car might idle roughly or stall when coming to a stop
Acceleration may feel sluggish or unresponsive
Common causes
A damaged or frayed wire in the sensor harness
A failing throttle position sensor itself
What to do
Frequently asked questions
What does code P0122 mean?
Throttle Position Sensor Low Voltage. The engine computer has detected an electrical signal from the throttle position sensor that is lower than the expected baseline. This sensor tells the computer how far down your foot is pressing the gas pedal, so a low reading means the system is not getting accurate throttle data.
Can I keep driving with code P0122 active?
With caution: limp mode possible, have it checked soon
Common causes — P0122
A poor connection or corrosion in the sensor wiring plug A damaged or frayed wire in the sensor harness A failing throttle position sensor itself
How do you fix code P0122?
Have a technician check the wiring plug and the sensor connector first for loose pins or corrosion. It is best to address this soon, as erratic throttle signals can make the car unpredictable to drive.
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