Possible causes – Faulty Accelerator Pedal Position (APP) Sensor– Accelerator Pedal Position (APP) Sensor harness is open or shorted– Accelerator Pedal Position (APP) Sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P2138 TOYOTA OBD Code Description The Accelerator Pedal Position (APP) sensor…