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Old 02-01-2009   #1
LGAFF
 
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Default Code 64

Is Code 64 a lean right bank?


This is on a 1990.
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90 #966-150K miles-sold
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1987 Callaway TT #17
1991 ZR-1 #1359
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Old 02-01-2009   #2
LGAFF
 
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Default Re: Code 64

Looks to me like a bad O2 or bad ground on the O2, does that sound correct?
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Old 02-01-2009   #3
XfireZ51
 
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Default Re: Code 64

Code 64 is a Lean O2 sensor reading. What was happening when the code set? The ECM was seeing a too low O2 sensor reading for at least 2 sec.
I would change the O2 sensors anyway but wouldn't count on the fact that its a defective O2 sensor.
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Old 02-01-2009   #4
LGAFF
 
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Default Re: Code 64

Went on while cruising.....not hard accel or anything. Car ran fine.
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1987 Callaway TT #17
1991 ZR-1 #1359
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Old 02-01-2009   #5
XfireZ51
 
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Default Re: Code 64

Quote:
Originally Posted by LGAFF View Post
Went on while cruising.....not hard accel or anything. Car ran fine.
Pull the battery, see if you get code again.
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Old 02-02-2009   #6
Paul Workman
 
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Default Re: Code 64

Quote:
Originally Posted by LGAFF View Post
Went on while cruising.....not hard accel or anything. Car ran fine.
My 95 LT1 Vette went thru 4 sensors - all failed resulting in a "lean" code.

My AutoXRay scanner sorted it out very quickly. You can get a bird's eye view of the cross counts and the range averages for both sides. It's available, if you want to use it.

P.
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