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91 Buick Century 3.3l V6 running rough, code 26 and 48

Tiny
IGLOWINTHEDARK2
  • MEMBER
  • 1991 BUICK CENTURY
  • 90,000 MILES
I have a 91 buick century 3.3l v6 that's running rough, has lost a good bit of its gas mileage and is giving me codes 26 and 48. The check engine light doesn't come on til after the car has gotten up to a warmer temperature, even faster on hot days, even slower on cold days

any idea what it might be?
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Friday, October 11th, 2013 AT 1:47 PM

2 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
The code 26 is for quad driver circuit. The code 48 is misfire diagnosis. How long since a tune-up? Replacing the 02 sensor is part of tune-up.
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Friday, October 11th, 2013 AT 2:31 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
This is for the code 26--A body.
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Friday, October 11th, 2013 AT 2:38 PM

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