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Q: Is this the only sensor that can cause this problem? Several sensor parts avail. on 1992 Mercury Grand Marquis

When I called the auto parts store there were several types of sensors for this year/make/model available. How do I know which one to replace? This car only has 90,000 miles on it and is in imaculate condition. I cannot afford to play process of elimination.
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What sensor and what problem? Can try avoiding the 'process of elimination' by having a shop diagnose it (and make them stand by their diagnosis!).Going by the description in your other post , I don't think the sensor or guage is the problem.........radiator- radiator cooling fan- Poor engine performance, & trans problems.
AutoZone does help. they can hook-up the diagnosis and print a slip with all the codes. This will narrow it down. Engine-Control sensors answer directly to the control module, for exact timing. You have a few of those. However, the coil or spark-plugs can be your 'culprit' as well. There are too many possibilities. w/o the read-out slip, it's all just guess-work.
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