Automatic transmissions Allison 3000 and 4000 Series with electronic control Gen4 Show 102550100 entriesSearch: ERROR CODE DESCRIPTION LAMP CHECK TRANS REACTION CONTROL SYSTEM C1312 Low voltage signal to the inclusion of retarder Off. Retarder is not included C1313 High voltage signal at the inclusion of retarder Off. Retarder is not included P0122 Intermittent or low level signal […]