I have an 2000 Freightliner FL70 with a cat 3126. When I do an air brake test a buzzer (I was told low oil pressure)

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Customer: Good day, I have an 2000 Freightliner FL70 with a cat 3126. When I do an air brake test a buzzer (I was told low oil pressure) stays on when I shut the engine down and turn the key back to on. I am taking the drivers test in PA and according to the test the buzzer should sound only when the air pressure hits 60 pounds. Any ideas and is this normal?
JA: Hi there. When was your last oil change? Have any error codes popped up?
Customer: Around 2000 miles ago and I don't see any error codes. This truck is new to em and I am new to this size truck
JA: What's the make/model of your 2000 truck?
Customer: Freightliner FL70
JA: Is there anything else the freightliner Mechanic should know before I connect you? Rest assured that they'll be able to help you.
Customer: I don't believe so
Answered by wtolkson in 20 mins 1 year ago
Auto Mechanic

34,684 satisfied customers

Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs

Hi, I'm Wayne.

I'll be assisting you with this issue today.

Thank you for coming to Just Answer

Your Question is as important to us as it is to you.

I am sorry to hear you are having this issue.

I go offline at 4 pm CST. M-F

Weekend 2-3 pm CST for the day.

The low air buzzer and the low oil pressure buzzer are the same buzzer and different sensors to turn it on.

So, engine off and key on, yes it should buzz, engine running pump the brake pedal below 60PSI, and the air buzzer should go off.

I hope this helps you.


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