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 4-101
Diagnostic Trouble Code (DTC) Charts and Descriptions
P1034 - Cylinder 3 Fuel Injector Heater Circuit Low
Description: This DTC sets when the PCM detects a concern with the FIH3 circuit.
Possible Causes: • FIH3 circuit open
• FIH3 circuit short to ground
• Damaged fuel injector heater 3
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test AB.
P1035 - Cylinder 3 Fuel Injector Heater Circuit High
Description: This DTC sets when the PCM detects a concern with the FIH3 circuit.
Possible Causes: • FIH3 circuit open
• FIH3 circuit short to voltage
• Damaged fuel injector heater 3
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test AB.
P1038 - Fuel Injector Heater Control Module Control Circuit
Description: This DTC sets when the PCM detects a concern with the FIHC circuit.
Possible Causes: • FIHC circuit open
• FIHC circuit short to ground
• FIHC circuit short to voltage
• Damaged fuel injector heater control module
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test AB.
P1039 - Fuel Injector Heater Control Module System Voltage
Description: This DTC sets when the PCM detects the voltage on the battery voltage circuit is greater than or less than a
calibrated range.
Possible Causes: • VBATT circuit open
• VPWR circuit open
• PWRGND circuit open
• Low battery voltage
• Charging system overcharging
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test AB.
P103A - Fuel Injector Heater Control Module Monitor Circuit
Description: This DTC sets when the PCM detects a concern with the FIHM circuit.
Possible Causes: • FIHM circuit open
• FIHM circuit short to ground
• FIHM circuit short to voltage
• Damaged fuel injector heater control module
Diagnostic Aids:
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.