Tachometer may fluctuate if screws holding PCM are not tight on Plymouth Neon

If the screws holding the case of the powertrain control module (PCM) are not tight, the tachometer may fluctuate or bounce from 300 to 1000 RPM while driving at a steady speed.

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Average mileage: (–)
1 model year affected: 1998
1 person reported this problem
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