Rally Sport
Member
- Joined
- Jul 13, 2025
- Messages
- 81
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- 5
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- Buick Ownership
- 2008 Buick lacrosse cx
If anyone has the engine code p0140 try cleaning the Mass airflow sensor that’s what caused my 08 Buick Lacrosse CX 3.8 to throw the code but it can also mess with the downstream 02 sensor as well or it could have a vacuum leak.
