Quote:
Originally Posted by eddieace
Little update, alarm service message now gone off car still has a dead battery when returning to it overnight, figured I’d give the battery a full charge and maybe try a current draw whilst at work, checked for any codes on the off chance and 2 stored, p0380 glow plug heater circuit A and u0301 software incompatible with ECM/PCM
Erased and restarted car, U0301 returns.
Not happy the alternator voltage drops from 14.5 volts to 13.2 (12.8) when electrics are being used.
Looking more and more likely it may need a dealer visit.
Unless someone has seen this u0301 before.
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What v50 to you have? If it is a drive model the alternator dose change voltage to keep the battery at 80% charge (maybe prolong battery life) and any thing above 12 volts is charging. I believe the alternator is common to go bad but it is bad if it only produces below 12.1 volts.
Other that, if you are able to drive it some distance the alternator is good. I would check for drain.
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Oct 21st, 2019, 22:19
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