Fault codes / Onan generator / 32
Onan generator code 32
What it means: Low cranking speed: under 180 rpm for 2 s.
What to check
Clean and tighten battery cables at both ends. Charge or replace the battery (450 CCA minimum). Use the right oil viscosity for the weather.
Learn the system
Practice it on a service call
Guided diagnosis
Other Onan generator codes
- Onan generator code 2 Low oil pressure
- Onan generator code 3 Service check: a two-digit code is stored
- Onan generator code 4 Over crank: 30 seconds without starting
- Onan generator code 12 Output over voltage
- Onan generator code 13 Output under voltage
- Onan generator code 14 Output over frequency
- Onan generator code 15 Output under frequency
- Onan generator code 19 Throttle actuator circuit fault
- Onan generator code 22 Governor actuator overload: near full duty too long
- Onan generator code 25 Alternator over voltage
- Onan generator code 26 Alternator under voltage
- Onan generator code 27 Pma sense lost
- Onan generator code 29 Battery over voltage
- Onan generator code 31 Over speed: above 3400 rpm
- Onan generator code 35 Control card failure (EEPROM)
- Onan generator code 36 Engine stopped without a stop command
- Onan generator code 37 Invalid generator set configuration
- Onan generator code 38 Over current / field overload
- Onan generator code 41 Generator rotor: can't sense field or output voltage
- Onan generator code 42 Processor ROM error
- Onan generator code 43 Processor RAM error
- Onan generator code 45 Speed sense: can't sense quadrature frequency
- Onan generator code 47 Ignition: control can't sense ignition
- Onan generator code 48 Generator field sense
- Onan generator code 51 Processor malfunction
- Onan generator code 52 Fuel injector open or short (EFI models)
- Onan generator code 54 Mat sender open or short (efi)
- Onan generator code 56 Map sender open or short (efi)
- Onan generator code 57 Over prime: more than 3 minutes
- Onan generator code 58 Exhaust gas temperature over 650°C (1202°F)
- Onan generator code 81 Egt sensor open
- Onan generator code 82 Egt sensor shorted
Full field guide: Cummins Onan RV generator
Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.