DIC Code P0175 Fuel Trim System Rich
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Joined: Jun 2004
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From: Keller Tx
DIC Code P0175 Fuel Trim System Rich
Need a little help 02 z with no modes and check engine light came on, so went into the DIC and got the code P0175 Fuel Trim System Rich bank 2-B. I have reset the codes to see if it come back if it does what do I need to do to correct the problem? Any assistance would be great.
Former Law Dawg Moderator
Joined: Jan 2005
Posts: 29,434
Likes: 96
From: Eads, Tennessee
CF St. Jude Co-Organizer
St. Jude Donor '05 thru '24
Moving this to the Tech section as you'll get better response there.
Do you have an aftermarket intake? My Blackwing caused codes on my '04.
Do you have an aftermarket intake? My Blackwing caused codes on my '04.
Burning Brakes
Joined: Aug 2007
Posts: 866
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From: Madison Wisconsin
My vararam threw a code just to later find out the MAF was on backwards 
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Le Mans Master
Joined: Aug 2005
Posts: 5,375
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From: CA.
St. Jude Donor '13-'14-'15
The computer has the ability to correct fuel trims in closed loop up to a certain point--usually it is +/- 25 % --If the trims are beyond that you will get a code--It could be just a false intermitent code but if it comes back--I would spray the inside of the MAF with brake-clean and let it dry good-A rich code can point to a clogged air tract -look for a dirty air filter or obstruction--Also-it could be excessive fuel pressure or a stuck injector--check the fuel pressure--should be around 50-58
psi--check the injector duty cycles to see if there are any abnormalities
psi--check the injector duty cycles to see if there are any abnormalities
