P2113 indicates that the Engine Control Module (ECM/PCM) has detected a performance problem with the 'B' circuit of the Throttle/Pedal Position Sensor at its minimum-stop (closed-pedal/idle) position. Modern drive-by-wire vehicles use redundant pedal position sensors (A and B) so the computer can verify throttle requests, and a reading outside the expected range at the closed position triggers this code. It is a sensor or wiring issue far more often than a computer fault.
The pedal-mounted sensor itself is the most common failure. Internal wear, contamination, or open/short within the sensor element produces an out-of-range signal at the closed-throttle position.
The harness leading to the accelerator pedal assembly is routed near moving or hot components and can develop broken insulation, stretched wires, or an open/short that distorts the B-circuit voltage.
The pedal position sensor connector is exposed to footwell moisture and debris. Corroded pins, a partially seated connector, or bent terminals are frequent sources of an erratic minimum-stop reading.
If the throttle plate is mechanically stuck, heavily carboned, or its own position sensors disagree, the ECM may interpret the pedal B signal as out-of-range even when the pedal sensor is good.
A mat pushing against the pedal can prevent it from reaching its true mechanical minimum-stop, making the B sensor read outside its calibrated window.
A failed ECM is uncommon for P2113. It should be considered only after the pedal sensor, wiring, connector, and throttle body have all been verified good and the manufacturer-specific pinpoint test points to the module.
Not usually. P2113 is specifically about the pedal position sensor's B circuit at minimum stop, not the throttle body itself. The pedal assembly (or its wiring) is the more common culprit, so replacing a throttle body first often wastes money.
Almost never. Drivers are sometimes told to replace the computer for this code, but that is usually incorrect. P2113 is a sensor-circuit performance code, and statistically the pedal sensor, its connector, or its wiring is the real cause. A PCM replacement should only be considered after every other possibility has been ruled out with proper voltage and continuity tests.
It depends on whether the vehicle has entered reduced-power (limp) mode. If power is normal and the code is intermittent, short drives are usually possible, but the issue should be diagnosed soon because the ECM uses the redundant sensor for a reason—if it loses confidence in the readings, it may cut power at an unsafe moment.
Many drive-by-wire vehicles require an idle or throttle relearn procedure after a pedal sensor or throttle body repair, performed with a scan tool or a specific ignition cycle. Whether it is needed, and the exact procedure, is vehicle-specific and should be confirmed in the service information.