HELP TROUBLE CODE PROBLEM
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HELP TROUBLE CODE PROBLEM
What might be causing me to get a PO 175 trouble code ???
PO 175 (System too rich Bank 2)
After a while the light shuts off and stays off for days and sometimes months..
Please let me know
Thanks
Dan
1997 F-150 4.6 L
PO 175 (System too rich Bank 2)
After a while the light shuts off and stays off for days and sometimes months..
Please let me know
Thanks
Dan
1997 F-150 4.6 L
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Joined: Jul 2002
Posts: 19
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From: Tulsa USA
HELP TROUBLE CODE PROBLEM
Dan -- Here's what the 1997 PC/ED Manual has for that particular DTC. 
H41 DTCs P0172, P0174, P0171 AND P0175: FUEL SYSTEM AT THE CORRECTED FUEL TRIM
Diagnostic Trouble Codes (DTCs) P0171 bank 1 (Cylinder 1) and DTC P0174 bank 2 indicate the fuel/air ratio is too lean. The fuel trim 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 trim system is at the lean correction limit.
DTCs HO2S Reference list:
[ul]
[li]HO2S-11 = DTCs P0171 and P0172
[li]HO2S-21 = DTCs P0174 and P0175
[/ul]
Possible causes:
Fuel System
[ul]
[li]Excessive fuel pressure.
[li]Leaking fuel injector(s).
[li]Leaking fuel pressure regulator.
[li]Low fuel pressure or running out of fuel.
[li]Contaminated fuel injector(s).
[li]Vapor management valve (VMV) leaking.
[/ul]
Induction System
[ul]
[li]Air leaks after the MAF.
[li]Vacuum leaks (vacuum lines and gaskets).
[li]Restricted air inlet.
[li]PCV system.
[li]Fuel purge system.
[li]Improperly seated engine oil dipstick.
[/ul]
EGR System
[ul]
[li]Leaking gasket.
[li]Stuck open EGR valve.
[li]Leaking diaphragm.
[/ul]
Base Engine
[ul]
[li]Oil overfill.
[li]Cam timing.
[li]Cylinder compression.
[li]Exhaust leaks before or near the HO2S(s).
[/ul]
[ul]
[li]Check intake air system for leaks, obstructions and damage.
[li]Check air cleaner element, air cleaner housing for blockage.
[li]Verify integrity of the PCV system.
[li]Check for vacuum leaks.
[/ul]
Cheers from Tulsa, OK!
Dave
H41 DTCs P0172, P0174, P0171 AND P0175: FUEL SYSTEM AT THE CORRECTED FUEL TRIM
Diagnostic Trouble Codes (DTCs) P0171 bank 1 (Cylinder 1) and DTC P0174 bank 2 indicate the fuel/air ratio is too lean. The fuel trim 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 trim system is at the lean correction limit.
DTCs HO2S Reference list:
[ul]
[li]HO2S-11 = DTCs P0171 and P0172
[li]HO2S-21 = DTCs P0174 and P0175
[/ul]
Possible causes:
Fuel System
[ul]
[li]Excessive fuel pressure.
[li]Leaking fuel injector(s).
[li]Leaking fuel pressure regulator.
[li]Low fuel pressure or running out of fuel.
[li]Contaminated fuel injector(s).
[li]Vapor management valve (VMV) leaking.
[/ul]
Induction System
[ul]
[li]Air leaks after the MAF.
[li]Vacuum leaks (vacuum lines and gaskets).
[li]Restricted air inlet.
[li]PCV system.
[li]Fuel purge system.
[li]Improperly seated engine oil dipstick.
[/ul]
EGR System
[ul]
[li]Leaking gasket.
[li]Stuck open EGR valve.
[li]Leaking diaphragm.
[/ul]
Base Engine
[ul]
[li]Oil overfill.
[li]Cam timing.
[li]Cylinder compression.
[li]Exhaust leaks before or near the HO2S(s).
[/ul]
[ul]
[li]Check intake air system for leaks, obstructions and damage.
[li]Check air cleaner element, air cleaner housing for blockage.
[li]Verify integrity of the PCV system.
[li]Check for vacuum leaks.
[/ul]
Cheers from Tulsa, OK!
Dave
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HELP TROUBLE CODE PROBLEM
Thanks Dave for the help..I went ahead and replaced the front 02 sensers.. And Reset the computer.. Also I placed a can of Sea Foam in the gas just incase that the injectors might be dirtty.. I hope this takes care of the problem...
Once again thanks for the info... And taking the time to write back...
Dan
