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Dave Nova
Dave Nova, Buick Technician
Category: Buick
Satisfied Customers: 1808
Experience:  ASE Master Certification. GM World Class Certification
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GM Buick: Cam, I have a 1996 Buick Century thats getting

Customer Question

Hi Cam, I have a 1996 Buick Century thats getting code P01406. I checked power and ground at EGR plug 12VDC. I have 5VDC reference and .6VDC signal. But it still throws the code. Replaced EGR,also. Just did intake gaskets now this problem. Intake was clean no carbon. 120,000 miles.
Submitted: 1 year ago.
Category: Buick
Expert:  Gary replied 1 year ago.
I am sorry for the long waitdo you have any access to a scan tool to view live computer data and perform output tests with the scan tool ?to find out exactly what our problem is we have to follow the code flow chart for this code to find the problem