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.
4-46 Powertrain DTC Charts and Descriptions
Diagnostic Trouble Code (DTC) Charts and Descriptions
P023C - Charge Air Cooler Coolant Pump Control Circuit High (Continued) Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test KP.
P0245 - Turbocharger/Supercharger Wastegate Solenoid A Low
Description: This DTC sets when there is a short to ground in the TCWRVS circuit.
Possible Causes: • TCWRVS circuit short to ground
• Damaged turbocharger (TC) wastegate regulating valve solenoid
• 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 only sets when the solenoid valve is energized.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test HN.
P0246 - Turbocharger/Supercharger Wastegate Solenoid A High
Description: This DTC sets when there is an open circuit or high voltage in the TCWRVS circuit.
Possible Causes: • TCWRVS circuit open
• TCWRVS circuit short to voltage
• Damaged turbocharger (TC) wastegate regulating valve solenoid
Diagnostic Aids: Check the harness for intermittent concerns, incorrect connections, routing, alterations and damage due to
contact with other components. This DTC only sets when the solenoid is not energized.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test HN.
P025A - Fuel Pump Module A Control Circuit/Open
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 or ground.
Possible Causes: • FPC circuit open or short to ground
• FPC circuit 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.
P025B - Fuel Pump Module A Control Circuit Range/Performance
Description: The fuel pump control module monitors the duty cycle and frequency of the signal it receives from the PCM. The
fuel pump control module determines if the signal from the PCM on the FPC circuit is a valid duty cycle and frequency. If the duty cycle or frequency is invalid, the fuel pump control module sends a 20% duty cycle signal on the FPM circuit to report the concern to the PCM. This DTC sets when the fuel pump control module is still reporting that it is receiving an invalid duty cycle or frequency from the PCM after a calibrated amount of time.
Possible Causes: • FPC circuit open or short to ground
• FPC circuit short to voltage
• Radio frequency interference or electromagnetic interference
• Damaged fuel pump control module
• Damaged PCM
Diagnostic Aids: Check the harness for routing, alterations, incorrect shielding, or electrical interference from other systems.
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.