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1994 Roadmaster Codes 64 and 63 and rough idle?

Adamly2

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1994 Roadmaster wagon
Hello:

My car is a 1994 Roadmaster and a few weeks ago started throwing a code 63 "Open circuit Right o2 sensor" today while raining the car started idling slightly rough and then threw a code 64 "Right o2 running lean" overtime the car startes running normal.


Is this likely an o2 sensor issue as I suspect or can it be somethkng else? Can a o2 sensor cause the error 64 code?

Thanks in advance
 

HotZ28

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1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
A vacuum leak can cause a lean condition and cause code 64. You need to especially take a look at the vacuum elbow connected to the PCV valve on the manifold, as well as all other vacuum connections.
 

Adamly2

New member
2
0
1
Buick Ownership
1994 Roadmaster wagon
A vacuum leak can cause a lean condition and cause code 64. You need to especially take a look at the vacuum elbow connected to the PCV valve on the manifold, as well as all other vacuum connections.
Is it not likely that the lean could be caused by a bad o2 sensor?
 
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