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2003 Buick Rendezvous Service Engine light on

Tiny
2CP-ARCHIVES
  • MEMBER
  • 2003 BUICK RENDEZVOUS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 31,000 MILES
2003 Buick Rendezvous mileage 31,000. Service Engine light on. Car runs rough between 35-40 Miles per hour. Code reader says EGR Flow Low. Replaced EGR vacuum regulator and EGR valve with no luck. Lots of black smoke in exhaust when under hard acceleration. Service engine light used to be intermittent but now it's always on.
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Tuesday, October 19th, 2010 AT 10:15 PM

1 Reply

Tiny
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  • MEMBER
  • 4,540 POSTS
Your problem may be a failing mass air-flow sensor or possibly oxygen sensors. Try temporarily unplugging the primarily oxygen sensors and test drive the car. If your problem persists, the mass air-flow sensor probably needs to be replaced.
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Tuesday, October 19th, 2010 AT 10:21 PM

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