I changed out one bad GP a week ago and while all seems normal, good cold starts no hesitation or roughness, my GP light is staying on for about 60 seconds after start. This started to happen today on either cold or hot starts. Previously, the GP light would go out on engine start.

Anyone else have this trait?

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Treetops
06 E320 CDI 127K Miles
87 300TD 231K Miles

99 E300 269K Miles-Sold