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06-01-2009, 04:51 PM | #1 | |
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service engine soon light
Hi all, My service engine soon light keeps coming on so I checked the ECM via the ALCL and it came back as a code 64. I checked the manual and code 64 reads "Right bank oxygen sensor circuit lean exhaust indicated". Now I hate to sound un-educated here but I looking for some help in locating the sensor. Is it the one just below the catalytic converter on the exhaust pipes? Does the 93 LT1 have 2 oxygen sensors? (Some of the parts sites stated "two required". I could really use some good info here. Any help is greatly appreciated.
Thanks, Sven |
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06-02-2009, 05:42 PM | #2 | |
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Re: service engine soon light
I think it's the O2 sensor in the exhuast manifold near the engine on the passenger side. If it's a '93 it shouldn't have an O2 sensor downstream of the cat. That's why the parts site was saying 2 O2 sensors, one for the left bank and one for the right.
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06-03-2009, 04:05 PM | #3 | |
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Re: service engine soon light
Thanks Manic. That's what the code book said, right bank sensor, mixture to lean. Hopefully changing the sensor will do the trick.
Sven |
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06-03-2009, 08:37 PM | #4 | |
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Re: service engine soon light
The "Lean" condition is not due to the sensor malfunctioning. You probably have a vacuum leak on the right bank of either the intake manifold, exhaust manifold or some source that will allow unmetered air into the right bank.
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06-14-2009, 05:58 PM | #5 | |
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Re: service engine soon light
Thanks discnik
Short of bringing it to the shop, can you (or anybody) provide some help on how to find a vaccuum leak? sven |
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07-25-2009, 06:08 PM | #6 | ||
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Re: service engine soon light
Quote:
Vacuum leak on the exhaust? Or on the intake side? Intake leak is an easy find. Exhaust is a little tougher... |
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