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.
4-112 Powertrain DTC Charts and Descriptions
Diagnostic Trouble Code (DTC) Charts and Descriptions
P161A - Incorrect Response From Immobilizer Control Module
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.
P162F - Starter Motor Disabled - Engine Crank Time Too Long
Description: This DTC sets when there has been at least 60 seconds of total accumulated cranking time without sufficient
time allowed between crank attempts for the starter to cool down.
Possible Causes: • Repeated excessive attempts to start the engine
• Vehicle is low on fuel
• Battery or starter motor concerns
Diagnostic Aids: This DTC may be accompanied by other DTCs. Diagnose all other DTCs first. Clear the DTCs and repeat the
self-test. If the DTC is retrieved again, check for the cause of the excessive crank time.
Application Key On Engine Off Key On Engine Running Continuous Memory
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
P1633 - Keep Alive Power (KAPWR) Voltage Too Low
Description: This DTC sets when the KAPWR circuit has experienced a voltage interrupt.
Possible Causes: • KAPWR circuit open
• KAPWR intermittent
Diagnostic Aids: Loss of KAPWR to the PCM results in immediate malfunction indicator lamp (MIL) illumination and sets DTC
P1633.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test QB.
P1635 - Tire/Axle Ratio Out Of Acceptable Range
Description: This DTC sets when the tire and axle information contained in the vehicle identification (VID) block does not
match the vehicle hardware.
Possible Causes: • Incorrect tire size
• Incorrect axle ratio
• Incorrect VID configuration parameters
Diagnostic Aids: Using the scan tool, view the tire and axle parameters within the VID. They must match the vehicle hardware.
Application Key On Engine Off Key On Engine Running Continuous Memory
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
P1636 - Inductive Signature Chip Communication Error
Description:
Possible Causes:
Diagnostic Aids: Check for other module DTCs and diagnose those first. 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.
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.