Fault Codes/Rehlko/SL0-5301RehlkoSL0-5301UnclassifiedAir IntakeWhat This Code MeansClogged air filter; Damaged air filter; Improperly installed air filterPossible Causes•Clogged air filter•Damaged air filter•Improperly installed air filterSuggested Actions1Inspect charge air pipe and exhaust gas turbochargerRelated Rehlko Fault CodesSL0-5311AIRDAMPERSPD SENS FLTSSPD SENS FLT SDRY CRLO WARNING WSPEED SENSOR FAULTREVERSE POWER SHUTDOWNSPN 730 FMI 3REPLACE CLOCK BATTERYSPN 730 FMI 4Browse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for SL0-5301 on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about SL0-5301GET THE ANSWERFree account required — we'll bring your question with you.