Q: Here is another 2004 Trailblazer issue. I’ve been getting P0141 codes. My local guy has replaced both O2 sensors twice, and the code keeps coming back within a couple of days. The engine runs fine ...

The Instigator: '97 Ford Mustang, 3.8L V-6. 90k miles. Got flagged as a Gross Polluter here in California, which means I need to take it to an expensive test-only shop. Not being rich, I need to make ...