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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8769
Experience:  I am ASE Master Truck Certified.
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C15 cat acert. Throttle becomes non responce at times with

Customer Question

C15 cat acert. Throttle becomes non responce at times with code 34
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 1 year ago.
Hi. Thanks for asking your question! I will try and help you out.
Code 34 indicates an engine speed timing sensor fault. I have seen this many times. Your engine has two engine speed timing sensors. One on the cam and one on the crank. To test you would need to ohm each one. You most likely have one that has failed.
Please reply back if you need more help or have more questions. I am happy to assist.

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