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 4-73
Diagnostic Trouble Code (DTC) Charts and Descriptions
P0482 - Fan 3 Control Circuit
Description: This DTC sets when the MFC output is commanded on (grounded) and excessive current draw is detected on
the MFC circuit; or when the MFC circuit is commanded off and voltage is not detected on the MFC circuit. The PCM expects to detect VPWR voltage through the medium speed fan control (FC) relay coil to the MFC circuit.
Possible Causes: • MFC circuit open
• MFC circuit short
• VPWR circuit to the MFC relay open
• Damaged MFC relay
Diagnostic Aids: When the MFC_F PID reads YES, a concern is present. An open circuit or short to ground can only be detected
when the PCM is not grounding the MFC circuit. A short to voltage can only be detected when the PCM is grounding the MFC circuit.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test KF.
P04DB - Crankcase Ventilation System Disconnected
Description: This DTC sets when the crankcase pressure sensor is disconnected.
Possible Causes: • Disconnected hose from crankcase to one side of the crankcase pressure sensor
• Disconnected hose from intake manifold to one side of the crankcase pressure sensor
• Damaged or pinched PCV hose o-ring seal
• Damaged dipstick o-ring seal
• Incorrectly installed dipstick
• Incorrectly installed oil cap
Diagnostic Aids: Verify the integrity of the PCV system.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test HG.
P0500 - Vehicle Speed Sensor (VSS) A
Description: This DTC sets when an error in the vehicle speed information is detected. Vehicle speed data is received from
either the VSS or the anti-lock brake system (ABS) module. If the engine RPM is above the torque converter stall speed (automatic transmission) and the engine load is high, it can be inferred that the vehicle must be moving. If there is insufficient vehicle speed data input to the PCM, a concern is indicated and this DTC sets. On most vehicle applications the malfunction indicator lamp (MIL) illuminates when this DTC sets.
Possible Causes: • VSS+ circuit open (VR type)
• VSS- circuit open (VR type)
• VSS circuit open (Hall effect type)
• VSS circuit short to ground (Hall effect type)
• VSS circuit short to voltage (Hall effect type)
• Damaged drive mechanism for VSS
• Damaged VSS
• Damaged wheel speed sensors
• Damaged wheel speed sensor harness circuits
Diagnostic Aids: Monitor the VSS PID while driving the vehicle. This DTC sets when a sudden loss of vehicle speed signal over a
period of time is detected. If vehicle speed data is lost, check the source of the vehicle speed input: VSS or ABS.
Application Key On Engine Off Key On Engine Running Continuous Memory
F-650 / F-750, GO to Pinpoint Test DF. F-Series Super Duty, Fiesta, Fusion, KA, Motorhome / Stripped Chassis / Step Van
Manual Transmission GO to Pinpoint Test DP.
Automatic Transmission The PCM uses information from the ABS module and the transmission control module (TCM) to
calculate vehicle speed. Check these modules for DTCs.
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.