P0122 Throttle or pedal position sensor A circuit low
- System
- Powertrain - engine and transmission
What P0122 means
"Throttle or pedal position sensor A circuit low input" says the signal from the first of the throttle or pedal position sensors sat below the lowest value that circuit is allowed to report. The letter A marks which sensor of several, since these are usually doubled up so the computer can compare one against the other. P0123 is the same limit crossed at the top.
This is a standard code. It means the same thing on every make of vehicle.
What the program shows for P0122
Throttle position, Relative throttle, Accelerator pedal and Throttle actuator are all separate readings on the Dashboard, which is what lets the pedal figure and the throttle figure be read against each other rather than one alone. The Inspection screen also reports whether the sensors and actuators monitor has finished.
The Dashboard shows Short fuel trim and Long fuel trim, Air flow, Manifold pressure, Intake air temp, Coolant temp, Throttle position, Accelerator pedal, Air/fuel ratio, O2 sensor (rear), O2 sensor current and whether the Fuel system is in closed loop. Record a drive and the Analysis screen gives the total correction At idle, Fuel trim against air flow, and whether the air flow and pressure sensors agree; the Full scan's On-board self-tests list the Oxygen sensor results by bank and sensor. Record before and after a repair and Compare shows the change in short, long and total trim at idle plus which codes are Gone, New or Still there.
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