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 4-47
Diagnostic Trouble Code (DTC) Charts and Descriptions
P025B - Fuel Pump Module A Control Circuit Range/Performance (Continued) Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test KC.
P025C - Fuel Pump Module A Control Circuit Low
Description: When the PCM commands the fuel pump (FP) ON, the PCM is able to detect a short to voltage on the FPC
circuit. When the PCM commands the FP OFF, the PCM is able to detect an open circuit or a short to ground on the FPC circuit. This DTC sets when the PCM detects the FPC circuit is shorted to ground.
Possible Causes: • FPC circuit short to ground
• Damaged fuel pump control module
Diagnostic Aids: Check for any harness concerns.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test KC.
P025D - Fuel Pump Module A Control Circuit High
Description: When the PCM commands the fuel pump (FP) ON, the PCM is able to detect a short to voltage on the FPC
circuit. When the PCM commands the FP OFF, the PCM is able to detect an open circuit or a short to ground on the FPC circuit. This DTC sets when the PCM detects the FPC circuit is open or shorted to voltage.
Possible Causes: • FPC circuit open or short to voltage
• Damaged fuel pump control module
Diagnostic Aids: Check for any harness concerns.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test KC.
P025E - Turbocharger/Supercharger Boost Sensor A Intermittent/Erratic
Description: This DTC sets when there are intermittent events in the TCBP circuit during a single drive cycle.
Possible Causes: • TCBP circuit intermittent open
• TCBP circuit intermittent short to voltage
• TCBP circuit intermittent short to ground
• Damaged turbocharger boost pressure (TCBP) sensor
• Damaged harness connector
• Damaged harness
Diagnostic Aids: Check the harness for intermittent concerns, incorrect connections, routing, alterations and damage due to
contact with other components. This DTC may be accompanied by other DTCs. Check for other DTCs and diagnose those first.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DN.
P026A - Charge Air Cooler Efficiency Below Threshold
Description: This DTC sets when the temperature differential between the intake air temperature 2 (IAT2) sensor value and
the charge air cooler temperature (CACT) sensor value is less than a calibrated value.
Possible Causes: • Low coolant
• Cooling system concern
• Biased IAT2 sensor
• Biased CACT sensor
• Damaged charge air cooler (CAC)
Diagnostic Aids: Check for any cooling system concerns.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test KP.
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.