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  1. 1Gen-Sequoia
    Hello, I’m hopeful someone can help me troubleshoot these catalytic converter codes so I can try to avoid throwing tons of money at the vehicle and not solving the problem. The vehicle has about 234k miles and the codes are for insufficient catalyst efficiency on each bank. These first showed...
  2. Engine, Intake, Exhaust, Induction
    I having a flashing engine code, and the truck is running very rough - when accelarating, the engine light goes from solid to flashing. Based on other posts, I think I need to replace #3 coil, but I have four error codes, all which started at the same time. I'm just wondering if they are all...
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