Fault Codes/Cummins/238Cummins238UnclassifiedGeneralWhat This Code MeansEngine has begun to overheat; High oil temperature; Engine shutdownPossible Causes•Higher ambient temperature•Increase in load•Oil temperature has risen to an unacceptable levelRelated Cummins Fault Codes239245236252234254226 THRU 233285225286224379Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 238 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 238GET THE ANSWERFree account required — we'll bring your question with you.