I have a check engine light that came on. the dtc 65 is showing.
1990 Buick LeSabre

I have a check engine light that came on. The dtc 65 is showing.

(1990 Buick LeSabre)
The check engine light came on showing dtc65. I looked it up and it said "Right bank O2 sensor rich exhaust indicated" Have any what that means? Thanks.
1 answer & 4 comments
Popular Answer
of GT Service Center on February 16, 2014
It means that o2 sensor is reading more fuel then air and the fuel mixture is not correct for efficient operation.
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on February 16, 2014
How do i correct this issue? Is it something a rookie can do?
of GT Service Center on February 16, 2014
When I was a rookie, I didn't know how, but several years later and updated equipment helps. Google the code and there should be something to help you understand what causes it, what to check. Could be an EGR, air filter, leaky fuel injector, etc.
on February 16, 2014
Ok. Thanks for your help. Time to do my homework.
of GT Service Center on February 16, 2014
Good luck, ask again if you need to.
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of GT Service Center on February 16, 2014
It means that o2 sensor is reading more fuel then air and the fuel mixture is not correct for efficient operation.
Sign in to reply
on February 16, 2014
How do i correct this issue? Is it something a rookie can do?
of GT Service Center on February 16, 2014
When I was a rookie, I didn't know how, but several years later and updated equipment helps. Google the code and there should be something to help you understand what causes it, what to check. Could be an EGR, air filter, leaky fuel injector, etc.
on February 16, 2014
Ok. Thanks for your help. Time to do my homework.
of GT Service Center on February 16, 2014
Good luck, ask again if you need to.

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