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1993 diesel DTC 12, 46, 55 codes

Old Sep 27, 2011 | 01:22 PM
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lord jim
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Default 1993 diesel DTC 12, 46, 55 codes

got these codes from counting check engine light flashes
1. what is code 12 meaning?
2. 46 tells me high charging voltage, I suspect that is reason why check engine light coming up when driving, if so haw can this voltage be adjusted (lowered). I cannot seems to find nothing what will look like voltage regulator
thanks for some suggestions
 
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