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Jerry, Master Mechanic
Category: Dodge
Satisfied Customers: 1754
Experience:  ASE Master tech, 30 years exp. troubleshooter, driveability tech
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Just drove home, about 45 minutes, 07 3500 6.7 litre Cummins

Customer Question

Just drove home, about 45 minutes, 07 3500 6.7 litre Cummins started to smell like brakes burning when I pulled in driveway. Checked brakes they were fine. I think it is ac compressor but still checking. I did check the o2 sensor it had a voltage reading of negative 2 volts with the engine still normal operating temp. What does this mean?
Submitted: 2 years ago.
Category: Dodge
Expert:  Robert R replied 2 years ago.
Hello, welcome and thanks for asking your question. My name is***** a Certified Auto Technician with 27+ years experience. I will do my best to assist you. please keep in mind that I may need to ask questions of you before I can answer. When you reply please feel free to add as much detailed information as possible pertaining to your concern.
When you checked the O2 sensors, what procedure did you use to check O2 sensor voltage?

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