05 with code c0121
#1
05 with code c0121
I have a 05 h2 with the brake, ABS, and T/C lights on the dash. pulled the codes and have c0121 which is valve relay circuit malfunction. doing a search can't find much info on this codes is this Relay in the EBCM and require replacement of the EBCM or is it located elsewhere on the truck?
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