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I have a 2004 GMC Yukon. The engine light keeps

I have a 2004 GMC Yukon. The engine light keeps coming on, the codes pulled say banks 1&2 are burning lean. any suggestions? It has 82,000 miles

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Check for vacuum leaks, especially the intake gaskets. Does it run rough on a cold start for a few seconds and then smooth out and run fine until the next cold start?

Posted on Mar 12, 2009


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How many o2 sensor are on a 2004 gmc yukon

Hi Charles,

GM products have 4 O2 sensors attached along the exhaust pipes coming off the manifold. Bank 1 is aligned to cylinder 1 on the engine which is the driver's side. Sensor 2 is the one after the convertor (Sensor 1 being the one before the convertor). Link attached for more information.

Oxygen Sensor Locations

I have changed out one of mine; quite easy, but you need a sensor wrench which you can find an any automotive store for around $15.

The part is available readily enough - link attached.

Good luck

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Multiple misfire on 2004 gmc Yukon 4.8 liter engine, can't diagnose?

Hi kathy
I am sure that your YUKON engine is not idling smooth.
the problem seems to me like you have a vacuum leak, better check inlet manifold and the vacuum hoses.
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Need to run codes. Can use reader at most auto parts stores. Very likely you have bad sensor at the wheel or something has obstructed the end. Code should tell you which wheel.

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1 Answer

Volkswagen 2004 Passat check Engine light keeps coming

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Engine light bank 1 and bank 2. Multiple misfire. I took car to have an oil change, let sevice tech talk me into getting fuel injection cleaned car been running bad every since, sputtering.

Dear Sputtering's how it goes. The "fuel induction service" that was performed was performed properly.....but not completed....this is when they introduce a topend chemical that knocks off all the carbon from the valves and upper piston area etc...the vehicle's fuel curve becomes temporarily disrupted resulting in poor fuel burn and misfire symptoms. After the chemical is introduced through the intake system the vehicle should be ran at a higher rpm to remove all carbon deposits if any are left over after the service. When this last stage isn't performed then the vehicle has the symptoms that you are experiencing. This will go may take up to 60 miles of driving.....the engine light will not go off until it is physically reset by a technician or your battery cable is removed and replaced after a minute.....please get back to me if you need any more help... I HOPE I COULD HELP!!!

Nov 16, 2009 | 2003 GMC Yukon XL

1 Answer

Which side is bank 2 on 04 yukon for sensor 2 replacement

if you look at the front of the motor you will notice one cyclinder is further forward then the other... that first cyclinder would be 1. i'm guessing the side opposite to cyclinder one would be bank two.


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2002 gmc yukon, rich fuel code, low fuel pressure @40

you may have two oxugen sensors on your yukon. if so the oxygen sensor that controls that bank may be bad. from what you mentioned in your complaint, it sounds like it is the oxygen sensor.

Dec 24, 2008 | 2002 GMC Yukon Denali

1 Answer

2003 yukon xl 5.3l flexfuel all plugs lean on passenger side

P0131 - Heated Oxygen Sensor (HO2S) Circuit Low Voltage

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Bank 1 Sensor 1
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I would check for vacuum leaks, maybe intake or brake booster

Dec 16, 2008 | 2003 GMC Yukon XL

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Service Engine Light

have u checked/ replaced your o2 sensors since you have owned the vehicle?

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