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Ask Hank F. Your Own Question
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 14479
Experience:  Certified on Onan and Generac generators
19372534
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Have a code 58 exhaust gas temperature shutdown on a model

Customer Question

Have a code 58 exhaust gas temperature shutdown on a model 5.5hgjab after just running less then 5 mintues
Submitted: 1 year ago.
Category: Small Engine
Expert:  Hank F. replied 1 year ago.

Hello, my name is ***** ***** I am going to assist you with this.

First, what is the serial number of the genset?

Wil the unit pull a 5500W load?

Customer: replied 1 year ago.
G140711319
And yes for 2 or 3 mintues it will hold a y load then shuts down, with code 58 high exhaust temperature for longer then 2 second
Expert:  Hank F. replied 1 year ago.

Sorry for the delay.

All of our kids came home for the weekend, and we went to the lake. I was unable to get any wireless reception all weekend.

This unit is still under warranty, and needs to go to an authorized Onan repair facility to be repaired under warranty.

If you need help locating one, let me know.

If you attempt to work on this yourself, you will be voiding your warranty, and will be responsible for the cost of any parts needed.

Code 58 is set when exhaust temperatures reach 1202 degrees F.

Possibilities here are:

Restricted exhaust system

Lean fuel supply

Bad ignition system

Bad heat sensor

Broken/loose/burnt wiring

Bad controller