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.
4-82 Powertrain DTC Charts and Descriptions
Diagnostic Trouble Code (DTC) Charts and Descriptions
P0600 - Serial Communication Link (Continued) Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test QE.
P0602 - Powertrain Control Module Programming Error
Description: This DTC sets when there is a programming error within the vehicle identification (VID) block.
Possible Causes: • VID data corrupted by the scan tool during VID reprogramming
Diagnostic Aids: Program the VID block. Refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory
(EEPROM), Making Changes to the VID Block. If the PCM does not allow reprogramming of the VID block, reflashing of the PCM is required.
Application Key On Engine Off Key On Engine Running Continuous Memory
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
P0603 - Internal Control Module Keep Alive Memory (KAM) Error
Description: This DTC sets when the PCM has experienced an internal memory concern. However, there are external items
that can cause this DTC.
Possible Causes: • Reprogramming
• Battery terminal corrosion
• KAPWR to PCM interrupt/open
• Incorrect battery connection
Diagnostic Aids: If KAPWR is interrupted to the PCM because of a battery or PCM disconnect, this DTC can be generated on the
first power-up.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test QB.
P0604 - Internal Control Module Random Access Memory (RAM) Error
Description: This DTC sets when the PCM RAM has been corrupted.
Possible Causes: • Module reprogramming
• Aftermarket performance products
• Damaged PCM
Diagnostic Aids: Reprogram or update the calibration. Check for other DTCs or drive symptoms for further action. Check for
aftermarket performance products before installing a new PCM. If it is necessary to install a new PCM, refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM), Programming the VID Block for a Replacement PCM.
Application Key On Engine Off Key On Engine Running Continuous Memory
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
P0605 - Internal Control Module Read Only Memory (ROM) Error
Description: The PCM ROM has been corrupted.
Possible Causes: • An attempt was made to change the calibration
• Module programming error
• Aftermarket performance products
• Damaged PCM
Diagnostic Aids: Reprogram the vehicle identification (VID) block. Check for other DTCs or drive symptoms for further action.
Check for aftermarket performance products before installing a new PCM. If it is necessary to install a new PCM, refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM), Programming the (VID) Block for a Replacement PCM.
Application Key On Engine Off Key On Engine Running Continuous Memory
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.