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I just bought the Bosch O2 sensors. Like you mentioned the car drove fine with these codes in all conditions. I probably drove over a thousand miles before getting to the sensors. Then once I replaced them, cleared the code, it came back. It wasn’t until after admitting defeat that one morning the check engine light just wasn’t on and the code never came back.
As for doing the CCV tubes, I’ve done them a few times now so I have the process down. First time can be frustrating, if you do tackle it. Start on the passenger side to understand how they clip onto the intake manifold. If you’re keeping the car for awhile you can go the extra mile and wrap them in a silicone tape as well for added protection.
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