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.
4-116 Powertrain DTC Charts and Descriptions
Diagnostic Trouble Code (DTC) Charts and Descriptions
P1709 - Park/Neutral Position (PNP) Switch Out Of Self-Test Range (Continued) 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.
P1780 - Transmission Control Switch (TCS) Out Of Self-Test Range
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.
P1793 - Ignition Supply Malfunction
Description: The ISP-R circuit is monitored for low and high voltage conditions. This DTC sets when the voltage is less than
7 volts or greater than 16 volts.
Possible Causes: • ISP-R circuit short to voltage
• ISP-R circuit short to ground
• Battery or charging system concern
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test B.
P17xx -
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.
P18xx -
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.
P1900 - Output Shaft Speed (OSS) Sensor Circuit Intermittent
Description: This DTC sets when the OSS sensor signal to the PCM is irregular or interrupted.
Possible Causes: • OSS sensor connector not correctly seated
• OSS harness circuits intermittent open
• OSS harness circuits intermittent short
• Damaged OSS sensor connector
• OSS sensor damaged, or not installed correctly
Diagnostic Aids: Verify the OSS harness and connector integrity. Verify correct installation of the OSS sensor.
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.