What does code P0122 mean?

P0122 — Low input from Throttle Position Sensor (TPS). Pedal is pressed but sensor reports zero — ECM enters limp mode. Belongs to the powertrain.throttle system. Severity: warning.

What are the common causes of P0122?

Break in TPS signal wire; Signal wire shorted to ground; Worn resistive track (analog TPS); Corroded connector; Failed electronic throttle body assembly

Can I drive with code P0122?

Limited: reaching the nearest workshop is fine, but avoid long trips. May progress into a more serious fault.

How do I diagnose P0122?

Read the code and freeze-frame with a scanner, check related-system errors, inspect the components listed (wiring, connectors, sensors). See the "How to diagnose" section above for the full step-by-step.

How do I clear code P0122?

The code can be cleared via an OBD-II scanner (e.g. ELM327 + the Car Diagnostics app): plug the adapter into the OBD port, go to Errors → Clear. If the underlying cause isn't fixed, the code will return within a few drive cycles.

OBD-II Code P0122 — Car Diagnostics Platform

What it means

Common causes

Break in TPS signal wire
Signal wire shorted to ground
Worn resistive track (analog TPS)
Corroded connector
Failed electronic throttle body assembly
Damaged wiring near the accelerator cable

How to diagnose

01
Read all stored and pending codes with an OBD-II adapter — get the full picture, not just the one code.
02
Capture freeze-frame data (RPM, coolant temperature, engine load) at the exact moment the code triggered.
03
Inspect the named subsystem with our app's AI explanation — get vehicle-specific causes for your make, model and year.

Decode P0122 on your actual car

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