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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8566
Experience:  I am ASE Master Truck Certified.
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My stop engine light is comming on i have a 97 pete with a

Customer Question

my stop engine light is comming on i have a 97 pete with a c15
JA: What is the complete model and serial number of your machine?
Customer: 379 pete
JA: Are you fixing this yourself? What have you tried so far?
Customer: yes on the highway on 95 in florida
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: i think its the sensor, but cant find it for the radiator
Submitted: 3 months ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 3 months ago.
Thanks for asking your question. I will try and help you out.
There are three things that will turn on your red engine light.
Low engine oil pressure.
High engine coolant temp.
Low coolant level.You most likely have a faulty sensor if all of these conditions are ok. To determine which sensor it is , I would like to use the cruise control switches to pull the flash codes from the ecm. If you have never done this. Here is how.Use the following procedure to retrieve the flash codes from the check engine light:
Turn the ignition key switch to the On position/ Engine OFF.
Turn the cruise control ON/OFF switch to the OFF position.
Move the SET/RESUME switch to either position. Hold that position until the yellow lamp begins to flash.
The yellow lamp will flash in order to indicate a two digit flash code and the SET/RESUME switch may be released. The sequence of flashes represents the system diagnostic message. Count the first sequence of flashes in order to determine the first digit of the flash code. After a two second pause, the second sequence of flashes will identify the second digit of the flash code.
Any additional flash codes will follow after a pause. These codes will be displayed in the same manner. Flash Code 55 indicates that No Detected Faults have occurred since the ignition key switch has been turned to the ON position.Let me know what two digit code you get and I can tell you what the problem is.