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    Rough idle

    I had the same problem for a few weeks. Turned out to be a vacuum leak. Had to replace a small elbow-shaped piece of rubber tubing and fixed the problem immediately. While the engine is idling, lift the hood and see if you can hear a hissing sound. Mine was very pronounced.
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    P0401, P0174, P0171 CEL Problem Solved

    Because I've gained a lot of valuable knowledge on this forum, particularly with this recent issue, I thought I would complete my due diligence by posting this thread. Now, I'm in no way, shape or form a mechanic or even mechanically inclined. However, the parts I talk about below are pretty...
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    Check engine codes P0401 and P0402 solution

    Did you change the DPFE sensor first? Or do the EGR valve work?
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    Check engine codes P0401 and P0402 solution

    Hey Folks, I just registered on this forum and I wanted to post a thread in relation to some of my recent issues. I got a lot of excellent information on here and I wanted to return the favor. For the past 6 months or so, my check engine light has been on. I initially got a code of P0402...
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