P420 Catalyst system efficiency below threshold bank 1
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P420 Catalyst system efficiency below threshold bank 1
I got this error code a few days ago after a long run. I did notice that the exhaust under the engine appears to be in quite bad shape when I did the oil change.
Here's a video of it running. It sounds far worse on video than in real life. It's quite a faint repetitive sound in person. Just an exhaust leak do you think..?
Here's a video of it running. It sounds far worse on video than in real life. It's quite a faint repetitive sound in person. Just an exhaust leak do you think..?
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