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Problem with System charge rate low

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Old Jan 5, 2022 | 11:29 PM
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upanddownau's Avatar
upanddownau
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Joined: Dec 2018
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From: Balnarring Victoria Aust
Problem with System charge rate low

I get an intermittent message advising my charge rate is low and service now. The little red battery icon shows on the dash after the message flashes.2 Auto Electricians have tried to find the source of the problem and others in the forum suggest it is due to fitting 850cca lithium batteries - which I'm sure if that was the case the message would be on all the time. I ran a forscan and the OBD showed the following:
DTC's in PCM - P163C . 00 -2F
Generator B Field Terminal Circuit Low
Malfunction indicator amp is off for this DTC
Pto Status is off>
BECM B Battery Energy control module shows:
Batt_V_Inf, V
0.00
Batt_Discharge_ Inf
0
Vehicle is a MY2018 F250 Platinum Diesel
Checked the charge rate and 13.7v and both batteries fully charged - Auto Elect's said that's perfect. Lithium battery manufacturers said there isn't any problems with heat - the under bonnet temp in the F250 is bloody hot.
Anyone able to suggest what to look for in the way of malfunctions?
 
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