Fault Codes/Caterpillar/7542Caterpillar7542UnclassifiedGeneralWhat This Code MeansInternal cavitation; Corrosion; Engine boiling; Engine freezingPossible Causes•Improper coolant condition•Lack of engine protection from coolant degradationSuggested Actions1Perform S·O·S Coolant Analysis at a Caterpillar dealer to monitor coolant and cooling system condition2Test the engine coolantRelated Caterpillar Fault Codes7542-554-OC7554-04074517554-51074501395-0821357-5101357-0401357-0251348-554-SM1152-5351078-535Browse all Caterpillar fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 7542 on your specific Caterpillar unit — cited to the OEM manual, not a forum guess.Your question about 7542GET THE ANSWERFree account required — we'll bring your question with you.