Code PO171 and PO174

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Oct 22, 2004 | 01:18 PM

Kevin97Formula

Thread Starter

Registered User

Joined: Apr 2001

Posts: 5

From: Austin, Tx

Code PO171 and PO174

My dreaded Service Engine Light has come on. I had the car scanned and it is indicating a "Lean Condition" on Bank 1 and Bank 2.. Anybody have an idea as to what is causing the the lean condition? Thanks

Oct 22, 2004 | 02:35 PM

Injuneer

Administrator

Joined: Nov 1998

Posts: 71,094

From: Hell was full so they sent me to NJ

Re: Code PO171 and PO174

Low fuel pressure would be one possible cause. Have you noticed any weakness or missing at higher RPM/high load? Have you checked the fuel pressure?

Oct 22, 2004 | 02:40 PM

LT4383

Registered User

Joined: Apr 2004

Posts: 274

From: Denver

Re: Code PO171 and PO174

Dirty M.A.F. ?

Oct 22, 2004 | 09:30 PM

Kevin97Formula

Thread Starter

Registered User

Joined: Apr 2001

Posts: 5

From: Austin, Tx

Re: Code PO171 and PO174

Thanks for the replies. I have already cleaned the MAF. Service Engine Light still comes on. I have not checked the fuel pressure, but I have no stumbling or sluggishness at high RPM. If the fuel pressure was low, what would cause this? fuel pressure regulator??