What are codes 44 and 66 at diagnostic plug? - Maintenance and Repair Forum

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What are codes 44 and 66 at diagnostic plug?
Wednesday, June 28, 2006 1:48 PM
On a '91 I'm getting codes 44 (which is "lean fuel"), and 66 (not listed on my chart).

Can you tell me what 66 is, and what may be my problem?
Thanks.





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Re: What are codes 44 and 66 at diagnostic plug?
Wednesday, June 28, 2006 2:52 PM
66 is for the A/C sensor. It won't trigger the CEL but it will flash if you check the code.



Gilles
2.3 Ho

Re: What are codes 44 and 66 at diagnostic plug?
Wednesday, June 28, 2006 3:40 PM
What do you think this would be, bad Oxygen sensor?





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Re: What are codes 44 and 66 at diagnostic plug?
Thursday, June 29, 2006 2:09 AM
Do you have it all the time? The code I mean.



Gilles
2.3 Ho

Re: What are codes 44 and 66 at diagnostic plug?
Thursday, June 29, 2006 5:16 AM
No, very sporatic. It will come on for maybe 30 seconds and go out. It may come on twice during a 20 minute drive.





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