How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Cat Man Your Own Question
Cat Man
Cat Man, Caterpillar Engine Expert
Category: Heavy Equipment
Satisfied Customers: 8918
Experience:  23 Years Caterpillar Engine experience.
Type Your Heavy Equipment Question Here...
Cat Man is online now
A new question is answered every 9 seconds

C15: my truck..3 fault codes when I do a diagnostic:47, 94, and 58

This answer was rated:

Hello. I am a company driver and my truck has a Cat C15 engine... it is displaying 3 fault codes when I do a diagnostic:

47, 94, and 58. Could you please tell me what these codes are? Thanks

Hi. Thanks for using JA! I will try and help you out.


Could you get me your engine serial number please?


Since it is an 2007 I mainly need to know if the engine is an emissions engine with a DPF or a pre emissions engine without a DPF.



Customer: replied 6 years ago.
It is a little faded but it looks like the serial number is XXXXX And my apologies, it is a C13 not a 15

No problem and thanks for the information.


Code 47 is an "Idle Shutdown Occurrence" fault


Code 58 is J1939 "Data Incorrect" fault


Code 94 is "Intake Valve Actuator" fault


I see codes 47 and 58 fairly regularly. They do not cause much cause for concern. However, code 94 will cause the engine to possibly derate and lose power.



Customer: replied 6 years ago.
I will be going to our main terminal tomorrow... could they fix a code 94 or does this need to go to a CAT dealer? Is it a long repair?

They should be able to. Code 94 is a problem with the Intake Valve Actuator Solenoid on either cylinder number 5 or 6. (Code 94 only indicates one or the other)


Your engine most likely needs to have the IVA solenoids replaced on the engine. It does not take long to do.



Cat Man and 2 other Heavy Equipment Specialists are ready to help you