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trouble codes 0172 and 0175 #65099 07/02/02 04:30 PM
Joined: Jun 2000 Posts: 382 shelby mi K kcobra OP Member
OP kcobra Member K Joined: Jun 2000 Posts: 382 shelby mi	i have been having trouble codes o172,0175 for a few days now and i deas on what might be causing them 98 se mtx k&n air filter custom short shifter intake res removed SVT Exhaust shoshop off road ypipe svt clutch pres. plate ,flywheel, and trans SVT gauges SVT front bumper SVT wheels fogs /parking airbox baffles removed

Re: trouble codes 0172 and 0175 #65100 07/02/02 05:12 PM
Joined: Dec 2001 Posts: 237 Alexandria, VA G G Pappas Member
G Pappas Member G Joined: Dec 2001 Posts: 237 Alexandria, VA	P0172=System Too Rich - Bank No. 1. P0175=System Too Rich - Bank No. 2. 1996 Contour SE Sedan 4D (Royal Blue) Duratec V6 2.5L 24-valve DOHC Automatic 75,000 miles No Mods (unless you call the DMD a mod) Replaced EGR valve (gunked up), EVR (EGR VR), PCV valve, and evaporative emissions hose (cracked).

Re: trouble codes 0172 and 0175 #65101 07/02/02 05:13 PM
Joined: Jun 2000 Posts: 382 shelby mi K kcobra OP Member
OP kcobra Member K Joined: Jun 2000 Posts: 382 shelby mi	i know what they mean i am trying to figure out what is causing them 98 se mtx k&n air filter custom short shifter intake res removed SVT Exhaust shoshop off road ypipe svt clutch pres. plate ,flywheel, and trans SVT gauges SVT front bumper SVT wheels fogs /parking airbox baffles removed

Re: trouble codes 0172 and 0175 #65102 07/02/02 05:25 PM
Joined: Jul 2000 Posts: 1,701 Memphis, TN area T tw0wheelin Member
tw0wheelin Member T Joined: Jul 2000 Posts: 1,701 Memphis, TN area	Possibly some obstruction of the intake air flow. Is your IMRC opening the secondaries OK? Do you have plugs not firing/missing? Scott 95 SE-2.5L ATX (120K+ miles & many mods)

Re: trouble codes 0172 and 0175 #65103 07/02/02 06:23 PM
Joined: Jun 2000 Posts: 382 shelby mi K kcobra OP Member
OP kcobra Member K Joined: Jun 2000 Posts: 382 shelby mi	yeah my 2ndaries are opening ok dont think i have anything plugs missing but if i did how could i tell if the were missing it sure does not feel like they are 98 se mtx k&n air filter custom short shifter intake res removed SVT Exhaust shoshop off road ypipe svt clutch pres. plate ,flywheel, and trans SVT gauges SVT front bumper SVT wheels fogs /parking airbox baffles removed

Re: trouble codes 0172 and 0175 #65104 07/02/02 10:52 PM
Joined: Dec 2001 Posts: 237 Alexandria, VA G G Pappas Member
G Pappas Member G Joined: Dec 2001 Posts: 237 Alexandria, VA	The following is from the Ford TSP: Quote: Diagnostic Trouble Codes (DTCs) P0171 bank (1) (cylinder #1) and DTC P0174 bank (2) indicate the fuel/air ratio is too lean. The fuel adaptive system is at the rich correction limit. DTC P0172 bank (1) and DTC P0175 bank (2) indicate the fuel/air ratio is too rich. The fuel adaptive syste is at the lean correction limit. DTCs HO2S Reference list: -- HO2S-11 = DTCs P0171 and P0172 -- HO2S-21 = DTCs P0174 and P0175 Possible causes: Fuel system -- Excessive fuel pressure. -- Leaking fuel injector(s). -- Leaking fuel pressure regulator. -- Low fuel pressure. -- Contaminated injector(s) Induction system -- Air leaks after the MAF. -- Vacuum leaks. -- Restricted air inlet. -- PCV system. -- Fuel purge system. -- Improperly seated dip stick. EGR -- leaking gasket. -- Stuck open EGR valve. -- Leaking diaphragm. Base engine -- Oil overfill. -- Cam timing. -- Cylinder compression. -- Exhaust leaks before or near the HO2S's. 1996 Contour SE Sedan 4D (Royal Blue) Duratec V6 2.5L 24-valve DOHC Automatic 75,000 miles No Mods (unless you call the DMD a mod) Replaced EGR valve (gunked up), EVR (EGR VR), PCV valve, and evaporative emissions hose (cracked).

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