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.
H: Fuel Control
H: Introduction
H1 CHECK FOR DTCS
Are DTCs P0171, P0172, P0174, P0175, P2195, P2196, P2197, P2198, P219A, P219B, P219C, P219D, P219E, P219F, P21A0, P21A1, P2270, P2271, P2272 or P2273 present?
Yes | No |
|---|---|
For DTCs P2270, P2271, P2272 or P2273, GO to H3 . For all others, GO to H2 . | RETURN to Section 3 , Symptom Charts for further direction. |
H2 RICH OR LEAN SYSTEM DTCS
Note: All PIDs may not be available on all vehicles.
Note: Do not clear the DTCs or reset the keep alive memory (KAM).
• Access the PCM and record the ECT or ECT1 PID from the freeze frame data. The freeze frame data is used to recreate the concern.
• Carry out the PCM self-test.
Are any DTCs present other than the following: P0171, P0172, P0174, P0175, P2195, P2196, P2197, P2198, P219A, P219B, P219C, P219D, P219E, P219F, P21A0 or P21A1?
Yes | No |
|---|---|
DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to Section 4, Diagnostic Trouble Code (DTC) Charts and Descriptions. | GO to H3 . |
H3 CARRY OUT A VISUAL INSPECTION
• Ignition OFF.
• Check the air filter element and housing for blockage.
• Inspect the entire air intake system from the mass airflow (MAF) sensor to the intake manifold for leaks such as:
◾ hoses connecting to the MAF sensor assembly ◾ cracked or punctured intake air tube ◾ loose connections on the intake air tube at the air cleaner housing or throttle body ◾ hoses connecting to the throttle body ◾ obstructions, restrictions, or damage
• Check the throttle plate for obstructions or sludge.
• Inspect the entire length of all the vacuum hoses for:
◾ correct connections
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.