Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
Powertrain DTC Charts and Descriptions 4-89
Diagnostic Trouble Code (DTC) Charts and Descriptions
P0657 - Actuator Supply Voltage A Circuit/Open (Continued)
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
P065x -
Description:
Possible Causes:
Diagnostic Aids: Refer to the Workshop Manual Section 303-14, Electronic Engine Controls.
Application Key On Engine Off Key On Engine Running Continuous Memory
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
P0660 - Intake Manifold Tuning Valve (IMTV) Control Circuit Open - Bank 1
Description: This DTC sets when the intake manifold tuning valve (IMTV) control signal is greater or less than an expected
calibrated range during continuous, key ON, engine OFF (KOEO) or key ON, engine running (KOER), self-tests.
Possible Causes: • IMTV circuit open
• IMTV circuit short to ground
• Damaged IMTV actuator
Diagnostic Aids: An IMTVM PID reading may indicate a fault.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test HU.
P0663 - Intake Manifold Tuning Valve (IMTV) Control Circuit Open - Bank 2
Description: This DTC sets when the intake manifold tuning valve (IMTV) control signal is greater or less than an expected
calibrated range during continuous, key ON, engine OFF (KOEO) or key ON, engine running (KOER), self-tests.
Possible Causes: • IMTV circuit open
• IMTV circuit short to ground
• Damaged IMTV actuator
Diagnostic Aids: An IMTVM PID reading may indicate a fault.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test HU.
P0685 - ECM/PCM Power Relay Control Circuit/Open
Description: This DTC sets when the ignition switch position run (ISP-R) circuit indicates the ignition is in the OFF, ACC, or
LOCK position, and the amount of time the PCM remains powered through the PCM power relay exceeds a predetermined amount of time.
Possible Causes: • PCMRC circuit short to ground
• Damaged PCM power relay
Diagnostic Aids: Ability to communicate with the PCM when the ignition is in the OFF, ACC, or LOCK position indicates a hard
fault.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test B.
P0686 - ECM/PCM Power Relay Control Circuit Low
Description: This DTC sets when the ignition switch position run (ISP-R) circuit indicates the ignition is in the OFF, ACC, or
LOCK position, and the amount of time the PCM remains powered through the PCM power relay exceeds a predetermined amount of time.
Possible Causes: • PCMRC circuit short to ground
• Damaged PCM
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.