Code Definition

P1122 — Pedal Position Sensor A circuit low input

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

About P1122

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

When P1122 is stored, the module has detected a signal or supply voltage lower than the expected operating range; and a sensor-related fault — the reported value from the named sensor is out of spec.

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 PCM monitors the Accelerator Pedal Position (APP) Sensor A signal to read the driver's throttle demand on an electronic throttle system. P1122 sets when the PCM detects the APP Sensor A signal below its calibrated minimum, typically under about 0.2V, for a set time. Because the pedal assembly carries more than one position sensor for safety, a low or implausible APP A signal usually triggers reduced power or a failsafe limp home mode so the vehicle stays controllable. The cause is normally a short to ground, an open reference or signal wire, or a failed sensor rather than the pedal genuine...

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