Question about Mercury Grand Marquis

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Have had these codes a year now and can not solve the issue recently changed PCV valve but did not solve the issue

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First--you gave us no vehicle description
Second-you gave us no drivability issues or problems your having
Third-Why would you drive around one year, with a check light on and codes,that is neglect and abuse
Fourth- PCV Valves-never need to be changed,clean if you like, every four years,they do absolutely nothing. They are only there, to regulate air flow from crankcase to induction. Educate yourself.

Posted on Oct 11, 2010


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Hi, have to checked to make sure there is PCV flow? I see you put in a new valve, but did you check it with the engine running? The hose or port may be clogged.

Please see my tip at . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

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Why would you change the speed sensor,just because you got a code. The code is the symptom,not always the causes of the issues or problems.
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Then go to trans issues,such as solenoid valve body.
You need professional help here. Too high tech and too much to know, to fix in your driveway.

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Everything on a car works together: Simple oil change or air filter change, or fuel filter change make a car start better.
Also there could always be a malfunctioning sensor, you can test this with the help of a mechanic or buy buying an OBDII code-checker at a store.

Let us know if you need further clarification else please accept the solution.
Thanks for contacting

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1 Answer

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