P2123 P2123 Code Definition Throttle/Pedal Position Sensor/Switch D Circuit High Input What the P2123 code means The P2123 trouble code indicates that the Engine Control Module (ECM), which is in charge of receiving a signal from the throttle position sensor,...
Hi there. Look on the engine for any ground wires. There could have been a ground wire that was disconnected to remove the valve covers causing all of the codes to appear. A ground that is not hook up can...
