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.
4-100 Powertrain DTC Charts and Descriptions
Diagnostic Trouble Code (DTC) Charts and Descriptions
P1026 - Engine Coolant Temperature 1/Cylinder Head Temperature 2 Correlation
Description: This DTC sets when the engine coolant temperature (ECT) and cylinder head temperature 2 (CHT2) sensor
readings differ by greater than a calibrated value.
Possible Causes: • Biased CHT2 sensor
• Damaged CHT2 sensor
Diagnostic Aids: Make sure the ECT and CHT2 sensor readings are within 17°C (30°F) of each other after 6 hours at ambient
temperature.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DL.
P1030 - Cylinder 1 Fuel Injector Heater Circuit Low
Description: This DTC sets when the PCM detects a concern with the FIH1 circuit.
Possible Causes: • FIH1 circuit open
• FIH1 circuit short to ground
• Damaged fuel injector heater 1
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test AB.
P1031 - Cylinder 1 Fuel Injector Heater Circuit High
Description: This DTC sets when the PCM detects a concern with the FIH1 circuit.
Possible Causes: • FIH1 circuit open
• FIH1 circuit short to voltage
• Damaged fuel injector heater 1
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test AB.
P1032 - Cylinder 2 Fuel Injector Heater Circuit Low
Description: This DTC sets when the PCM detects a concern with the FIH2 circuit.
Possible Causes: • FIH2 circuit open
• FIH2 circuit short to ground
• Damaged fuel injector heater 2
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test AB.
P1033 - Cylinder 2 Fuel Injector Heater Circuit High
Description: This DTC sets when the PCM detects a concern with the FIH2 circuit.
Possible Causes: • FIH2 circuit open
• FIH2 circuit short to voltage
• Damaged fuel injector heater 2
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test AB.
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.