94 LT1 code 44
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94 LT1 code 44
I know its left O2 sensor reading lean. the O2 sensors are new as of 3 years ago. the check engine light will only come on after I drive it for about 15-20 miles while its hot out. after the light comes on I can smell exhaust and unburnt fuel. the person I got the scanner tool from said I have a vacuum leak on the left side. I checked everything and did not see anything out of the norm 
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From: Dublin CA
Check your wires to this O2 sensor. If there is oil...it will contaminate the readings giving a false code 44 and since the sensor is reading actual as something else, it will change your fuel mixture. The oil works it way past the weatherpak connector and onto the wires which changes the resistance being registered by the sensor. Solution...clean the wires and replace the sensor.
Last edited by John A. Marker; Jun 17, 2011 at 06:29 PM.
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St. Jude Donor '12
What brand of o2 sensors did you put in when you replaced them?
Several folks report problems with Bosch 02 sensors
Several folks report problems with Bosch 02 sensors
Thread Starter
Team Owner
Joined: Feb 2003
Posts: 53,988
Likes: 9,355
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
Thread Starter
Team Owner
Joined: Feb 2003
Posts: 53,988
Likes: 9,355
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
Check your wires to this O2 sensor. If there is oil...it will contaminate the readings giving a false code 44 and since the sensor is reading actual as something else, it will change your fuel mixture. The oil works it way past the weatherpak connector and onto the wires which changes the resistance being registered by the sensor. Solution...clean the wires and replace the sensor.
