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Running lean check engine light came on and went to auto zone to put the computer and they said its running lean

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02 sensor is what causes lean and rich mixture. If it is not correct then 02 sensors beed ti ve reokaced,

Posted on Sep 29, 2009


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Check engine light is on autozone gave P2270 after checking it? What does this mean?

This P2270 trouble code refers to the post-catalytic converter O2 (oxygen) sensor on bank #1, sensor #2.

Check this site:
P2270 O2 Sensor Signal Stuck Lean B1S2

P2270 O2 Sensor Signal Stuck Lean B1S2

Feb 28, 2015 | Cars & Trucks

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I have a 2001 Jimmy with "Service Engine Soon"

P0171 System too lean bank 1
P0174 System too lean bank 2

Last time you changed your fuel filter?
Look for any vacuum leaks.

Sep 05, 2011 | 2001 GMC Jimmy

1 Answer

What does the check engine light indicate.

When lit, the computer has found some type of problem with the engine computer system, often a bad sensor, or something electrical with the ignition, such as mis-fires, running rich/lean, etc. Auto Zone can find out why the light is on, by hooking up a OBD II diagnostic reader, to retrieve the code, that is associated with the paticular sensor.

Mar 15, 2010 | 2003 Saturn L-Series

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I have a Ford escort 1998 check engine light is on code is PO171 running to lean bank 1 what do I need to look for please to fix the problem?

It is most likely you E G R valve. They sometimes clog . It is a part of your smog emissions kit. It will hender the reburn of you excess gas fumes and will result in a lean code on your computer. You can buy one to put on yourself for about 50.00 bucks or sometimes you can use a product called seafoam that can be bought a auto-zone and run it through your vacum system and it will clear it up

Nov 10, 2009 | 1998 Ford Expedition

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2000 Lincoln LS and the Engine Light came on. Codes 0171 0174

you probably have a vacuum leak. check all your hoses pcv hose for sure. it means the engine is seeing too much air with the fuel.

Oct 02, 2008 | 2006 Lincoln LS

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