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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8412
Experience:  I am ASE Master Truck Certified.
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C-15 fault code sht 128 385 03 Can you help. Truck is

Customer Question

C-15 fault code sht Hi 128 385 03
Can you help. Truck is running fine but MIL is on
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 1 year ago.
Hi. Thanks for asking your question and requesting me! I will try and help you out.
I have seen the 385-3 code many times on the C15. It's a pretty common fault.
The 385-3 is defined as an open circuit on the intake valve actuation pressure sensor circuit. Most likely a failed sensor but could be a harness problem. The sensor has three wires and is located on the passenger side of the engine on top of the head near the front. I would inspect the harness that connects to it. If it is OK. I would replace the sensor.
Please reply back if you need more help or have more questions. I am happy to assist.
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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