Good Sam Club Open Roads Forum: Tech Issues: Onan5500 won't run
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 > Onan5500 won't run

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bukweet53

Pensacola fl

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Posted: 06/30/21 05:38pm Link  |  Quote  |  Print  |  Notify Moderator

After having intermittent shutdowns and code 2. After changing oil it will only run if I pull wire off oil pressure switch. On a recent trip it shutdown a few times throwing code 2 even after adding oil. Shutdowns at different times and days.

Grit dog

Black Diamond, WA

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Posted: 06/30/21 07:28pm Link  |  Quote  |  Print  |  Notify Moderator

First blush is bad oil pressure switch.


2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29

jdc1

Rescue, Ca

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Posted: 07/01/21 10:54am Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

First blush is bad oil pressure switch.


Agreed. It's $10 part. Worth trying before paying someone to look at it.

A1B00902

Vancouver B.C CANADA

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Posted: 07/01/21 12:32pm Link  |  Quote  |  Print  |  Notify Moderator

Onan Generator Blink Code 101
Onan Generator Fault Code List
Code 2 - Low Oil Pressure
Code 3 - Service Check
Code 4 - Over Crank
Code 12 - Over Voltage
Code 13 - Under Voltage
Code 14 - Over Frequency
Code 15 - Under Frequency
Code 19 - Governor Actuator Overload
Code 23 - Low Oil Pressure Cutoff Switch
Code 27 - Voltage Sense Error
Code 29 - High Battery Voltage
Code 31 – Overspeed
Code 32 - Low Cranking Speed
Code 35 - Control Card Failure
Code 36 - Engine Stopped
Code 37 - Invalid Generator Set Configuration
Code 38 - Over Current (Field Overload)
Code 41 - Generator Rotor
Code 42 – Processor
Code 43- Processor Fault Code.
Code 45 - Speed Sense
Code 47 – Ignition
Code 48 - Generator Field Sense
Code 51 – Processor
Code 52 - Fuel Injector
Code 54 - MAT Sender
Code 56 - MAP Sender
Code 57 - Over Prime
Code 58 - Exhaust Gas Temperature Shutdown
Code 81 - Exhaust Gas Temperature Sensor Open
Code 82 - Exhaust Gas Temperature Shorted
Onan Generator Code Reset
Some Final Words





Grit dog

Black Diamond, WA

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Posted: 07/01/21 04:41pm Link  |  Quote  |  Print  |  Notify Moderator

jdc1 wrote:

Grit dog wrote:

First blush is bad oil pressure switch.


Agreed. It's $10 part. Worth trying before paying someone to look at it.


Or low oil pressure, which would be easily diagnosed by throwing the (cheap) part at it first.

bukweet53

Pensacola fl

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Posted: 07/02/21 03:32pm Link  |  Quote  |  Print  |  Notify Moderator

So took wire off switch and it cranked up. Ran it for two hours no problem. Let it cool down and checked oil, it was a little below the full mark. Hooked wire up an it fired up and ran just fine. Maybe just a bubble and needed a good fart... running fine now.Thanks everyone !!

Hurricaner

Hurricane Utah

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Posted: 07/05/21 11:53pm Link  |  Quote  |  Print  |  Notify Moderator

When you change the oil, prefill the oil filter before you screw it on.
Sam


Sam & Kari
Hurricane, Utah


2019 Winnebago Sightseer 33C

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