Medium and Heavy Trucks
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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.
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Yes it will. If the controller communicates with the ECM it will cause the code 58.
What kind of problem are you having with the engine?
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