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<blockquote data-quote="52merc" data-source="post: 16058385" data-attributes="member: 197"><p>Have you changed rear axle ratio or tire size and tried to reprogram the PCM for that? If you have, there may be an error in the coding for those. The P0620 error comes from the Vehicle Identification block of the PCM and indicates that some parameter entered to determine vehicle characteristics is wrong.</p></blockquote><p></p>
[QUOTE="52merc, post: 16058385, member: 197"] Have you changed rear axle ratio or tire size and tried to reprogram the PCM for that? If you have, there may be an error in the coding for those. The P0620 error comes from the Vehicle Identification block of the PCM and indicates that some parameter entered to determine vehicle characteristics is wrong. [/QUOTE]
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