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Hello everyone!

Yesterday check engine light came on on my 2005 Tundra. I run the diagnosis and it says that The system is too lean in Bank 1 and 2. And Also there is misfire in every cylinder but not in #7. Did anyone experienced similar combinations of issues with that engine? Thanks for any help!
 

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I have an 02 Sequoia so no vvti which i think maybe you have. but i had misfire on all cylinders except 7 and it turned out to be the timing belt jumped a tooth or two. i ended up replacing the timing belt. i made a thread here:


it's a pita on mine but you may want to check the timing by putting the crank at 0 and pulling back the cam covers and checking if the marks on the cams line up with the marks on the head.
 

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Hello everyone!

Yesterday check engine light came on on my 2005 Tundra. I run the diagnosis and it says that The system is too lean in Bank 1 and 2. And Also there is misfire in every cylinder but not in #7. Did anyone experienced similar combinations of issues with that engine? Thanks for any help!
if lean on both bank, try clean mass airflow first ,and could be any vacuum leaks between mass airflow and throttle body will also cause lean both banks and miss firing .
 

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Thank you! I will do that and will reply here about the result.
Did you by any chance replace or disconnect the battery recently? I had all kinds of weird codes happening because I replaced the battery and then didn't drive it a few times. Just let it sit for a few days b4 I could drive it, and wow, the idiot lites were lit up big time. Checked codes and there was quite a few. Resolved by disconnecting the battery, then reconnecting, clearing codes, and drove immediately on the freeway and about town. Then let it sit overnight. Next day the last idiot light went out as I was driving it. No mores codes either. I couldn't believe that something so simple would cause so many problems and frustration.
 

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As suggested get the proper cleaner and clean the Mass Airflow Sensor. Check all hoses for vacuum/air leak. Had those codes and found that one of the air hoses had been shoved off of its nipple during a regular fluid level check under the hood.
You can use a scanner to erase codes (Auto parts store will do this for you if you don't have a scan tool) or do a total reboot by disconnecting the battery cables, clamp them together for 10 minutes then re-connect battery. Note: you will lose radio and some other owner pre-sets so make notes before a total re-boot. Chap
 
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