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.
Measurement Unit Minimum Pressure Maximum Pressure
kPa | -0.50 | 0.50 |
psi | -0.07 | 0.07 |
in-H20 | -2.0 | 2.0 |
V | 2.1 | 2.9 |
Is the pressure within specifications?
Yes | No |
|---|---|
For DTC P0451, GO to HX19 . For DTC P144A, GO to HX16 . For DTC P1450, GO to HX17 . For all others, GO to HX30 . | GO to HX11 . |
HX11 CHECK FOR ANY OTHER DTC
• Check for other 3 wire sensor DTCs (KOEO, KOER, or continuous memory) present with the DTC P1450, P144A or P2450.
Are any other 3 wire DTCs present?
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 HX19 . |
HX12 CHECK IF THE ENGINE IDLES
• Ignition ON, engine running.
Does the engine stall or is it unable to maintain idle?
Yes | No |
|---|---|
GO to HX13 . | GO to HX14 . |
HX13 CHECK THE EVAP SYSTEM FOR A STUCK OPEN EVAP PURGE VALVE
• Ignition OFF.
• Disconnect the fuel vapor to intake manifold line at the EVAP purge valve and cap the line at the EVAP purge valve.
• Ignition ON, engine running.
Does the engine stall or is it unable to maintain idle?
Yes | No |
|---|
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.