In this video Miss Marie has a look at a Chevy Sonic that comes in with the engine light on and has a lean code stored in it. This is her first diagnosis she has attempted and is an ambitious learner! Be sure to check out Mike over at NGK to learn more about Fuel Trims and up your game when it comes to lean and rich codes. -Enjoy!
Fuel Trims—Testing & Diagnosing Rich and Lean Conditions (P0171, P0172, P0174, P0175): https://www.youtube.com/watch?v=BlcWBZ-iaTY
