Bank 1 lean
07-13-2009, 10:34 AM
#1
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Bank 1 lean
ok so i went had had check engine light tested and i figured it was just evap leak.... but i got a code sayin bank 1 is lean.... i looked n cant find nothing that could cause this? my car always smells like gas but i cant find a leak?..... im not sure what to do... bank 1 is passanger side.... any ideas will help please let me know
07-13-2009, 10:59 AM
#4
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i dont remember i went to autozone.... but my check engine light usally comes on 1 time a month and it use to b evap leak.... i belive its my gas tank has leak at top of filler neck cuz when i fill it all the way up it leaks a 1/4 gallon or so... but then i thought it was just evap so i took it to get it turned off and then it said bank 1 lean...
07-13-2009, 11:53 AM
#5
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Join Date: Jul 2006
Location: Delaware
Posts: 6,717
i dont remember i went to autozone.... but my check engine light usally comes on 1 time a month and it use to b evap leak.... i belive its my gas tank has leak at top of filler neck cuz when i fill it all the way up it leaks a 1/4 gallon or so... but then i thought it was just evap so i took it to get it turned off and then it said bank 1 lean...
07-14-2009, 08:17 AM
#9
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Join Date: May 2009
Location: NY
Posts: 151
Why do you automatically assume a bad 02 sensor? Maybe the 02 sensor works fine and is reporting a problem? Thats why they are there lol. Sorry to jump on you I had like 5 people at work ask me to replace their 02's because of 02 codes yesterday.
Like white fox said most of the time a lean code is thrown because of intake side vacuum leak, or possibly a cracked exhaust manifold. I recently had a bank 2 sensor 1 lean CEL and I found that there was a small crack in the collector of my long tube. Welded it up and now code is gone.
What I would do if I was in your shoes is goto a sears auto center, They don't have great techs but a exhaust evaluation is free. Have them check for a exhaust leak. If nothing. start searching through your vacuum lines.
Like white fox said most of the time a lean code is thrown because of intake side vacuum leak, or possibly a cracked exhaust manifold. I recently had a bank 2 sensor 1 lean CEL and I found that there was a small crack in the collector of my long tube. Welded it up and now code is gone.
What I would do if I was in your shoes is goto a sears auto center, They don't have great techs but a exhaust evaluation is free. Have them check for a exhaust leak. If nothing. start searching through your vacuum lines.
07-14-2009, 08:25 PM
#10
Resident Ford Troll
Join Date: Jul 2006
Location: Delaware
Posts: 6,717
Why do you automatically assume a bad 02 sensor? Maybe the 02 sensor works fine and is reporting a problem? Thats why they are there lol. Sorry to jump on you I had like 5 people at work ask me to replace their 02's because of 02 codes yesterday.
Like white fox said most of the time a lean code is thrown because of intake side vacuum leak, or possibly a cracked exhaust manifold. I recently had a bank 2 sensor 1 lean CEL and I found that there was a small crack in the collector of my long tube. Welded it up and now code is gone.
What I would do if I was in your shoes is goto a sears auto center, They don't have great techs but a exhaust evaluation is free. Have them check for a exhaust leak. If nothing. start searching through your vacuum lines.
Like white fox said most of the time a lean code is thrown because of intake side vacuum leak, or possibly a cracked exhaust manifold. I recently had a bank 2 sensor 1 lean CEL and I found that there was a small crack in the collector of my long tube. Welded it up and now code is gone.
What I would do if I was in your shoes is goto a sears auto center, They don't have great techs but a exhaust evaluation is free. Have them check for a exhaust leak. If nothing. start searching through your vacuum lines.
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