M5G

1996 Lumina 3.1 L engine mileage 100,450

Took car to one of the car parts stores and had the codes read for the on/off again red check engine light...Codes read P0102, P0134, and P0300.

The misfires on all at times concerns me; but it could be tied to all codes read!??
Is there a tie between these codes? I have read the codes but they seem to possibibly be common causes to the same problem! Car runs good...maybe a little rought idle. Gas mileage 20.5 mpg in town. New plugs recently (all 6).

The check engine light comes on and may stay on for a while and goes off for sometime. Then again it comes on??

Any help will greatly be appreciated, before I spend a lot of $$ ..
If you have experience same--please share your findings and resolving the problem...

Many thanks in advance!

zephram22

Although I'm not completly sure what those particular codes are for, I do know that the "P" prefix means it has to do with the powertrain.

__________________
1963 Triumph TR3 12K
1995 Buick Century Special 178K
1999 Chevy Lumina LTZ 160K
2001 Suburu Forester 53K
2002 Oldsmobile Aurora 3.5 45K
2004 BMW Z8 3K
2005 Dodge Charger .5K
2006 Jaguar XJ12 1K

jkind

p0102- Mass aiflow sensor- high frequency detected

p0134- upstream heated o2 sensor insufficient activity (bank 1, sensor 1)

p0300- cylinder misfire detected (random)

Copied from my Haynes manual.


Jim