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the o2 sencer, temp. sencer, or the air temp sencer can. the o2 sencer, temp. sencer, or the air temp sencer can.

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Q: What can make a 2000 Mercury Sable 3.0 dohc run lean?
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2000 mercury sable and the check engine light is on you diagnostic checked it and the code was 171 It read systems lean Any suggestions?

Fuel filter


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my mercury 2000 sable is running lean--how expensive to fix?The way I read this, is the questioner want to purchase a new 02 sensor because the vehicle is running lean(??)The sensor is not the CAUSE of the lean condition - it is only the sensor which reported the reading that the computer then has interpreted to be a lean condition.Something else is happening that is generating the scan codes - likely some type of vacuum leak - air getting into the system that the computer is unaware of.It's kinda like buying a new thermometer when it reports you have a fever, in order to get rid of the fever.Btw, the car's diagnostic trouble codes (DTC) will be much more specific when the 02 sensor really is failing.See "Related Questions" below for more


What vacuum line will make both banks on my 2003 mercury sable 3.8 duratec engine run lean?

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What causes a 2000 sable to rough idle when cold but a smooth idle when engine is warm?

Most likely bad intake manifold gasket. When the engine is cold the engine shrinks which unseals the intake and allows a small amount of unregulated air into the engine causing it to idle rough. as the engine heats up it expands sealing the leak causing idle to improve. You should also get lean codes from the computer as the engine is running to lean. Very common problem with the DOHC engine. See "Related Questions" below for more


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How do you fix codes P0171 and P0174 in a 99 mercury sable LS with the check engine light on?

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Can you put a automatic dohc neon engine with sohc manual clutch?

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What is a system too lean bank 1 on a mercury mystique?

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What is the code p0174 on a 2000 Lincoln ls 2000?

Trouble code P0174 means: Fuel System Too Lean (Cylinder Bank 2)