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1987 Buick Century Code 42

HANSEN34

MEMBER
1987 BUICK CENTURY
4 CYL
2WD
AUTOMATIC
130,000 MILES

Checked the codes for this car and it lists codes 21, 34 & 42. Took care of 21 but cannot figure out what 34 & 42 are and where the sensors are located. Any help would be appreciated.

Friday, August 8th, 2008 AT 6:09 PM

1 Reply

BMRFIXIT

MECHANIC
19,053 POSTS

DTC 34 is MAF sensor Signal volts too low
check wiring and sensor
sensor located after the air filter and before or on the throttle body

DTC 42
open or short to ground in the electronic spark module or the by-pass circuits

good luck

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Friday, August 8th, 2008 AT 10:47 PM

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