Smoke coming from 02 sensor/exhaust manifold

Tiny
CORTEZ LARKIN
  • MEMBER
  • 2005 PONTIAC GRAND PRIX
  • 3.8L
  • 6 CYL
  • 2WD
  • 185,000 MILES
When I start my car I get smoke and a clicking sound coming from the 02 sensor where the exhaust manifold connects.
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Sunday, February 9th, 2020 AT 8:04 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

That is an exhaust leak. If the smoke is coming from where the sensor is located, make sure it is tight. If it is tight, remove it and inspect the threads on it. Also, inspect the exhaust manifold for cracks. Note that there is a chance it is leaking where the manifold meets the cylinder head.

Check these and let me know what you find. I will further direct you once we determine the source of the leak.

Joe
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Sunday, February 9th, 2020 AT 8:46 PM

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