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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8623
Experience:  I am ASE Master Truck Certified.
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Have 3126 catepiller motor with flash code 72,73,74, 58 what

Customer Question

have 3126 catepiller motor with flash code 72,73,74, 58 what do they mean
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 1 year ago.

Thanks for asking your question. I will try and help you out.

Code 72 is defined as a fault with injector circuits 1 and 2

Code 73 is defined as a fault with injector circuits 3 and 4

Code 74 is defined as a fault with injector circuits 5 and 6

Normally when an engine has all of these, it indicates the injector driver module in the engine ECM is faulty. If this is the case, the ECM will need to be replaced.

Code 58 is defined as a data link fault. It indicates there's a device on the truck not reporting to the ECM.

Please reply back if you need more help or have more questions. I am happy to assist.

Customer: replied 1 year ago.
if there is a body control module unplugged would it cause that code 58
Expert:  Cat Man replied 1 year ago.

Yes it will. If the controller communicates with the ECM it will cause the code 58.

Please reply back if you need more help or have more questions. I am happy to assist.

Expert:  Cat Man replied 1 year ago.

What kind of problem are you having with the engine?

Expert:  Cat Man replied 1 year ago.

Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.

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