several SES codes 26, 34, 63 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-11-2006, 08:01 PM   #1
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Default several SES codes 26, 34, 63

I just checked my car & I have 3 SES codes stored.
I have code 26 which I know is a quad driver circuit,

then a code 34 something about the mass air flow, which i just replaced, but is still on

also a code 63 exhaust gas recirculation flow check????

Anyone have a clue on how to try & fix these?

Plus the car is hard to start. I have to try & start the car 3 or 4 times to get it to start. But after I drive it for a while & stop for a few minutes then go it will start right up with no problems.

Oh yeah the car is a 1989 Bonneville SE
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