Question about 1986 Mercury Grand Marquis

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The engine light on our 1986 Mercury Grand Marquis came on and stayed on. When checked, a code of 34 comes on. What does this code mean?

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Code 34 means you are not getting any egr flow. find your egr valve and check to see if vacume hose is attached, if so follow the hose to the egr solenoid which should have that hose and a direct vac hose going to it. and an electrical connector. make sure all of these things are in place and not disconected or broken. the most likely cause is either a broken vacume hose or a clogged intake manifold.

Posted on Jul 10, 2010

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1994 Mercury Grand Marquis Check Engine Light Code 332


its the tube going from the egr valve to your exhaust it have carbon build up and you either have to replace it or get a metal coat hanger and clean it out.

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332 = EGR valve opening not detected.

You should be able to find a list of DTC's on the Internets somewhere.

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