Spark

DTC P0656

The engine control module (ECM) creates the fuel gauge output signal by pulsing the circuit to ground. The ECM monitors the voltage on the fuel gauge output circuit. If the ECM determines that the voltage is out of the normal operating range, a DTC sets.

The ECM detects a short circuit to voltage, a short circuit to ground, or an open/high resistance on the fuel level output circuit.

DTC P0656 is a Type C DTC.

DTC P0656 is a Type C DTC.

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

1. Ignition ON, verify that DTCs related to the P16 Instrument Panel Cluster (IPC) are not set.

⇒	If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .

2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

1. Ignition OFF, disconnect the harness connector at the K20 ECM.
2. Ignition ON, test for 4.8-5.2 V between the fuel level output circuit terminal 40 and ground.

⇒	If less than the specified range, test the fuel level output circuit for a short circuit to ground or open/high resistance. If the circuit tests normal, replace the P16 IPC.

⇒	If greater than the specified range, test the fuel level output circuit for a short circuit to voltage. If the circuit tests normal, replace the P16 IPC.

3. If all circuits test normal, replace the K20 ECM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.