Question about 2005 Mercury Sable GS

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Check engine light stays on my 2005 Mecury Sable GS

Check Engine light stays on. Auto Zone reads code PO174 What can I do to fix the problem?

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Try disconnecting battery negitive battery terminal for 1min 30secs with ignition in the on position.If this fails to work a code reader is required to reset computer.... hope this helps!!

Posted on Dec 30, 2012

  • william Apr 17, 2014

    thank you very much

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Trouble Code: P0174

Fuel System Too Lean (Cylinder Bank 2)

Possible Causes:


Air leaks after the MAF sensor, or leaks in the PCV systemExhaust leaks before or near where the HO2S is mountedFuel injector(s) restricted or not supplying enough fuelFuel system not supplying enough fuel during high fuel demand conditions (e.g., the fuel pump may not supply enough fuel)Leaking EGR gasket, or leaking EGR valve diaphragmMAF sensor dirty (causes PCM to underestimate airflow)Vehicle running out of fuel or engine oil dip stick not seated

Posted on Dec 30, 2012

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05 mercury sable check engine po174


You has a vacuum leak on the engine.

In order to troubleshoot this, you must start with a clean engine wipe down.


The major offender parts are


air intake gasket on the manifold

air tube after the mass air flow sensor

rubber seal under idle air control IAC motor

===

Warm up the engine for 15-20 minutes (LEAVE THE engine at idle) then spray a little Barmen carburetor clear on the potential air leak location (ONE AT A TIME) and listen for a surge in rpm.

If the engine speed go higher that's mean the carburetor clean (ADDITIONAL FUEL) got into your engine and that's the gasket you need to change.

There may be multiple leaky spots so take your time and check all rubber gaskets,sensor and hose that are lead into the intake manifold.

When you finish fill up with one tank of Chervon to clean out the injectors.

Please post more information after your inspection.

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2002 Sable LS 43,000 miles. Check Engine light on again!


without a fault code its impossible to diagnose. try pep boys or aamco or auto zone they will pull the code for you, usually for free. The code will relate to a sensor or area to be fixed. This will save you money and needless parts . post the code or codes so we can help

Feb 17, 2009 | 2002 Mercury Sable

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