Question about 1992 Mercury Topaz

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Services codes 31 and 63 come up when getting computer read

We have a 1992 mercury topaz and these two codes keep comeing up what are they and how do you fix them?

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31 canister or egr valve control system,63 throttle position sensor or circuit,for egr inspect visually hoses elect. plug at egr solenoids after that you might want to buy a repair manual because theres quite a few test to do.for tps check unplug connector at sensor connect 1probe of dig.ohmmeter to center terminal the other on either side move throttle slowly,resistance should vary slowly,if its erratic or none change tps ,voltage at plug not sure,think its 5vlt

Posted on Feb 26, 2009

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Fuse diagram for 1992 Mercury Topaz


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1 Answer

1992 mercury topaz


I had the same problem. It was the idle air control valve. It sits on top of the intake just downstream from the throttle. There's a valve rod inside that gets worn over time and starts to stick. If that's what is causing your problem, you need to replace the unit.

Dec 14, 2008 | 1992 Mercury Topaz

1 Answer

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Robert

Please take a moment to rate this solution thanks

Oct 08, 2008 | 1992 Mercury Topaz

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Topaz


still waitting your answer plz

Jul 24, 2008 | 1992 Mercury Topaz

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