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Old 09-05-2017, 06:32 PM   #1
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Runs rough. What happened?

I have a fairly new-to-me 2002 Boxster base with the 2.7 and 223,000 miles. While sitting at a red light yesterday, the car died and siunded very odd when trying to crank it. I was afraid maybe I was experiencing an IMS failure. I pushed it out if the road and after a couple of minutes tried it again and it started but ran very rough. I drove it home with the cel on and it periodically flashed. I checked the codes when I got home and had: p300,301,302,303, and 343. It will still start but runs rough. Anybody experience anything like this? Where do I start? Could it be as simple as a wiring issue with the cam position sensor or a bad sensor?

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Old 09-05-2017, 06:47 PM   #2
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I had a similar thing happen. The MAF cover came off and stuck in throttle body. Ran but real rough.
New MAF runs great.
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Old 09-05-2017, 07:17 PM   #3
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Those codes indicate misfires on bank 1, and the bank 1 camshaft position sensor reporting an out of limits issue. Could be wiring, the sensor, or it could be correctly reporting a timing issue.

https://rennlist.com/forums/boxster-and-boxster-s-986-forum/797262-986-boxster-s-02-p0343-camshaft-sensor-code.html

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Last edited by Paul; 09-05-2017 at 07:23 PM.
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