Code 34
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From: Anna, Tx
Code 34
I have a 89 305 TBI formula, and the check engine light comes on when im driving, checked code and its 34, not sure what that is. It goes away when i shut the car off and start it again, any help would be great. Thanx
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
From the Board FAQ:
"34. Low voltage (high vacuum) at mass air flow sensor (or MAP sensor)"
"34. Low voltage (high vacuum) at mass air flow sensor (or MAP sensor)"
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Joined: Sep 1999
Posts: 154
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From: Gardendale, AL., USA
Car: '89 Formula
Engine: 305 TBI
Transmission: Auto
Does this show any symptoms?
Just curious, as I get a "34"....but no "service engine" light unless the motor is shut down.
I DO have symptoms, though......
Rough idle and or engine shut-down once "closed loop" is attained. Runs fine after a rather difficult re-start.
Just curious, as I get a "34"....but no "service engine" light unless the motor is shut down.
I DO have symptoms, though......
Rough idle and or engine shut-down once "closed loop" is attained. Runs fine after a rather difficult re-start.
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