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.
Is a concern present?
Yes | No |
|---|---|
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test. | For DTC P018B, GO to DD7 . For all others, INSTALL a new Fuel Pressure Sensor. REFER to the fuel system WARNING information at the beginning of Pinpoint Test HC. GO to Pinpoint Test HC . REFER to the Workshop Manual Section 310-01, Fuel Tank and Lines. Clear the PCM DTCs. REPEAT the self-test. |
DD7 COMPARE THE FLP PID TO THE MECHANICAL GAUGE
Note: The vehicle may exhibit a long crank until the fuel system is pressurized.
• Ignition OFF.
• Relieve the fuel pressure. Refer to the Workshop Manual Section 310-00, Fuel System for the Fuel System Pressure Release procedure.
• Mechanical fuel pressure gauge connected.
• Disable the fuel pump.
• Ignition ON, engine OFF.
• Monitor the mechanical gauge.
• Access the PCM and monitor the FLP (PRESS) PID.
• Compare the FLP PID value to the mechanical gauge.
• Ignition OFF.
• Pressurize the fuel system. Refer to the Workshop Manual Section 310-00, Fuel System for the Fuel System Pressure Release procedure to pressurize the fuel system.
• Ignition ON, engine running.
• Allow the fuel pressure to stabilize.
• Ignition OFF.
• Ignition ON, engine OFF.
• Compare the FLP PID value to the mechanical gauge.
Are the FLP PID values within 153 kPa (22 psi) of the mechanical gauge readings?
Yes | No |
|---|---|
The system is operating correctly at this time. | INSTALL a new Fuel Pressure Sensor. REFER to the fuel system WARNING information at the beginning of Pinpoint Test HC. GO to Pinpoint Test HC . REFER to the Workshop Manual Section 310-01, Fuel Tank and Lines. Clear the PCM DTCs. REPEAT the self-test. |
DD8 CHECK THE VREF AND SIGRTN CIRCUITS FOR AN OPEN
• Ignition OFF.
• For Mustang 5.2L,
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.