Code Definition

P1122 — Throttle Position Stuck Closed

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Mazda

About P1122

P1122 is a manufacturer-specific powertrain diagnostic trouble code recorded for Mazda vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1122 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Throttle Position Sensor (TPS) reports the angle of the throttle plate to the Engine Control Module (ECM) so it can manage air intake and fueling. DTC P1122 sets when the ECM detects the throttle position signal remains at or near the closed value and does not respond when the throttle should be opening, indicating the throttle is mechanically stuck closed or the TPS is reporting a stuck low signal. On Mazda electronic throttle systems this can result from carbon binding the throttle plate, a failed throttle actuator motor, or a TPS or wiring fault holding the signal low. With this code se...

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