Counting the check engine light flashes is giving me 12 and also 55. Anybody tell me what they mean? Trying to troubleshoot why the grid heaters are not working. Any where else I need to be looking?
1992 D250
1992 D250
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JDiehl
Turn key on three times in a row and leave on the third time but do not start. Watch the check engine light flash and count number of flashes. All codes are two digits and there is a slight pause inbetween each code.
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