PO171 and PO174 ANY HELP?SUGGESTIONS?
#1
PO171 and PO174 ANY HELP?SUGGESTIONS?
Hi all,
I left my car sitting for one 24 hours and when i got into it this morning, the "check engine" light came on. Took it to autozone and it gave the PO171 and 174 errors (System too lean bank 1 and 2). I put some gas treatment in it, ran it for a while but the light stayed on. I researched a lil about it, and saw it might be couple of reasons - O2 sensors, MAF sensor, a leak or something. Where is the MAF sensor located so i can start by cleaning it and is this a very alarming error code or something that i can watch for a couple more days. I dont get any misfires or nothing neither is the engine rough while idling. Everything seems normal. Im not knowledgeable in this so any help would be appreciated.
I left my car sitting for one 24 hours and when i got into it this morning, the "check engine" light came on. Took it to autozone and it gave the PO171 and 174 errors (System too lean bank 1 and 2). I put some gas treatment in it, ran it for a while but the light stayed on. I researched a lil about it, and saw it might be couple of reasons - O2 sensors, MAF sensor, a leak or something. Where is the MAF sensor located so i can start by cleaning it and is this a very alarming error code or something that i can watch for a couple more days. I dont get any misfires or nothing neither is the engine rough while idling. Everything seems normal. Im not knowledgeable in this so any help would be appreciated.
#2
Join Date: Sep 2008
Location: Damon /Houston, Texas
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Replace the pcv hose, the vacuum line to the brake booster,(or heat shrink a large piece of heat shrink over the 1 way ck valve in the middle of the line), and both imt orings in the intake. These are all known issues for lean engine code on this car/engine. And the newest 1 ive been seeing alot of lately is the brake booster itself is leaking vacuum. And evidently becoming more of an issue cause they were back ordered for a month and we were waiting for 5 here alone.
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rominempire
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
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10-08-2020 10:39 AM
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