P0620 code after HO alt install

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Old Jun 8, 2008 | 10:55 PM
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From: Colorado
P0620 code after HO alt install

Anybody familiar with this code at all:

P0620 Generator Control Circuit

Installed my 200 amp mean green alt on my 07 F150 today, did the big 3, and now I have a batt error light on the dash and its throwin a P0620 code. Cleared the code with my programmer and it comes back in about 30 seconds.

It is charging, cold it charges 14.4, warm about 13.9.

Anybody seen that code before? Going to call mean green in the morning but was hopin somebody here has seen it before.
 
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