Accelerator Pedal Position Sensor Circuit Low Input
The car is not getting the correct signal from the accelerator pedal sensor. This can keep the throttle from responding normally and can trigger reduced power mode. The problem is usually in the pedal sensor, wiring, or a related connector.
You may be able to move the vehicle, but acceleration can be limited or unpredictable. Avoid highway driving and get it diagnosed soon, because the engine may enter reduced power mode.
P2122 indicates the PCM has detected a low voltage or low input signal in accelerator pedal position circuit A. This usually means the signal from the APP sensor is below the expected range, which prevents the PCM from accurately controlling throttle response. The cause may be a failing accelerator pedal assembly, damaged wiring, poor connector contact, throttle control issues, or a PCM fault.
A weak battery or charging problem can sometimes contribute to sensor and throttle control issues, but it is usually not the main cause.
Not usually. P2122 is more commonly caused by the accelerator pedal sensor or wiring, though throttle system problems can be involved.
You can clear it, but if the fault is still present the code will return. Driving with this code can leave you with limited power or throttle response.