p0420 code on 2002 lasabre
#1
Senior Member
Posts like a 4 Banger
Thread Starter
p0420 code on 2002 lasabre
Hello everyone,
I am getting a p0420 code on my 2002 Buick Lasabre. The cat. is 4 yrs old, the front sensor is 2 or 3 yrs old. The rear sensor is original. I am wondering if it would make sense to replace rear sensor and hope it takes care of problem or go through the trouble and expense of having the system checked. at garage.
I haven't noticed any symptoms. Any advice appreciated.
I am getting a p0420 code on my 2002 Buick Lasabre. The cat. is 4 yrs old, the front sensor is 2 or 3 yrs old. The rear sensor is original. I am wondering if it would make sense to replace rear sensor and hope it takes care of problem or go through the trouble and expense of having the system checked. at garage.
I haven't noticed any symptoms. Any advice appreciated.
#2
Senior Member
You can go Autozone, and they can plot data on their scan tool, for the front and rear O2 sensors...if the rear, mirrors the front, need a cat...the front should be rapidly changing while the rear should be very slow in comparison.....if the rear mirrors, or changes rapidly like the pre O2 sensor, need a cat...
#4
Senior Member
Posts like a Turbo
Hello everyone,
I am getting a p0420 code on my 2002 Buick Lasabre. The cat. is 4 yrs old, the front sensor is 2 or 3 yrs old. The rear sensor is original. I am wondering if it would make sense to replace rear sensor and hope it takes care of problem or go through the trouble and expense of having the system checked. at garage.
I haven't noticed any symptoms. Any advice appreciated.
I am getting a p0420 code on my 2002 Buick Lasabre. The cat. is 4 yrs old, the front sensor is 2 or 3 yrs old. The rear sensor is original. I am wondering if it would make sense to replace rear sensor and hope it takes care of problem or go through the trouble and expense of having the system checked. at garage.
I haven't noticed any symptoms. Any advice appreciated.
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