CODE 42
UnclassifiedElectrical
What This Code Means
Microprocessor ROM error occurred during self test; Microprocessor RAM error occurred during self test; Control is unable to sense quadrature frequency; Control is unable to sense field voltage; Priming exceeded 3 minutes; Status Indicator Not Working; Remote control switch start doesn't work
Possible Causes
- •Microprocessor ROM error
- •Microprocessor RAM error
- •Control is unable to sense quadrature frequency
- •Control is unable to sense field voltage
- •Object holding either control switch (remote or generator set) in the STOP/PRIME position
- •Faulty connections
- •No battery voltage
Suggested Actions
- 1Contact Local Dealer or Distributor
- 2Check control switch
- 3Check for and remove any object that may be holding either control switch (remote or generator set) in the STOP/PRIME position
- 4Try the generator set control switch if the remote control switch start doesn't work, and vice versa
- 5Clean and tighten the positive (+) and negative (–) battery cable connections at the battery and at the generator set
- 6Recharge or replace the battery
Related Cummins Fault Codes
ASK RUDY ABOUT THIS FAULT
Get a diagnosis walkthrough for CODE 42 on your specific Cummins unit — cited to the OEM manual, not a forum guess.
TRY IT FREE