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Juan Crespo
Juan Crespo, Tech Trainer
Category: Buick
Satisfied Customers: 1492
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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Brake light comes on and alarm go's off when driving, Yes

Customer Question

Brake light comes on and alarm go's off when driving
JA: Have you checked the brake fluid? How's the level and when was it last changed?
Customer: Yes went to brake check and paid 400 for them to do the brakes and it still doing that 3 codes came up when they did that u1016 u1060
JA: What is the model/year of your Buick?
Customer: 2003 rendezvous
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: If we can if we can't then I have to pay someone
JA: Anything else you think the mechanic should know?
Customer: No
Submitted: 2 months ago.
Category: Buick
Expert:  Juan Crespo replied 2 months ago.

Hi there.

You mention three codes coming up, but you only list two of those (of which only U1016 is valid - there is no U1060 listed for your Rendevouz; closest ones would be U1040 or U1064); what's the third code number?

Customer: replied 2 months ago.
U1040 u1016 and b 20th and then they give her a paper with p1571 p 1689 p1811 and u1040
Expert:  Juan Crespo replied 2 months ago.

Thank you for that information.

I don't have anything on b 20th or P1689, but the rest of the codes seem to indicate the Electronic Brake Control Module (EBCM) has dropped off the serial data communications network and that is causing issues with the brakes, traction control and transmission systems. A Tech-II or equivalent scan tool would be needed to pinpoint the fault and reprogram the module if replacement of same is necessary - which basically means the vehicle would have to be taken to a qualified repair shop.

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