P064E

DTC P064D or P064E

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptors
DTC P064D
- Control Module HO2S Bank 1 Sensor 1 System Performance

DTC P064E
- Control Module HO2S Bank 2 Sensor 1 System Performance

Circuit/System Description

This diagnostic applies to internal Heated Oxygen Sensor (HO2S) circuitry conditions within the engine control module (ECM).

Conditions for Running the DTC

* The engine speed is greater than 25 RPM.
* The ignition voltage is between 11-16 Volts
* The engine has cycled ON and OFF between 6-16 times dependent on coolant temperature.
* The DTCs run continuously once the conditions above have been met for greater than 10 seconds.

Conditions for Setting the DTC

The ECM detects a condition with the integrated circuits of the HO2S for greater than 10 seconds.

Action Taken When the DTC Sets

DTCs P064D and P064E are Type B DTCs.

Conditions for Clearing the DTC

DTCs P064D and P064E are Type B DTCs.

Reference Information
Description and Operation

Engine Control Module Description (Engine Control Module Description)
DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)

Circuit/System Verification

1. Ignition OFF, open the hood to disable the Auto-Stop function.
2. Ignition ON, verify the scan tool hood position parameter displays Open.

• If the hood position does not display Open, refer to DTC P254F (P254F).

3. Engine idling, observe the DTC information with a scan tool. DTC P064D or P064E should not set.

• If a DTC failed this ignition, replace the ECM.

4. 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.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Programming and Relearning) for engine control module replacement, setup, and programming