Tuesday, February 21, 2012

Auto Sleuthing: Trailblazer code P0171 problems




This is the most common mistake by people who want to save money and do it yourself. A check engine light is on, and you've just got someone to scan your vehicle. In this case, it's a Chevy Trailblazer with a 4.2 liter engine.

Looks like oxygen sensors on the surface, but it's just not as simple as that. You run out and buy a couple oxygen sensors, but still have the problem.

Watch this video by my friend Mark Hicks at Wells Vehicle Electronics to find the real reason the check engine light is on with this particular vehicle.

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