What Does P0654 Mean? The Instrument Panel Cluster (IPC) supplies a voltage to the Engine Speed Output circuit. The Powertrain Control Module (PCM) creates the Engine Speed Output signal by rapidly grounding this circuit via an internal switch called a driver. The other components on this circuit recognize the voltage being pulled to ground as an indication of engine speed. The driver supplies the ground for the component being controlled. Each driver has a fault line which the PCM monitors. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential of the circuit should be high (near battery voltage). engine code P0654P0654 fixobd P0654dtc P0654obd code P0654obd2 P0654P0654 car codediagnostic code P0654car code P0654check engine code P0654fehlercode P0654P0654 fiatcodigo P0654codigo falla P0654P0654 kody b??dówcodigo de falla P0654 What are the common causes of P0654 ? Some aftermarket accessories and performance modifications A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area. Faulty IMRC actuator relay (if equipped) How do you troubleshoot P0654 ? There are currently two main types of cylinder deactivation used today, depending on the type of engine. P0654 code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed. Searches related to P0654 Code - Engine Speed Output Circuit P0654 P0655
