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Old 06-15-2009, 08:52 PM   #1
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Cel
1999 Boxster 25K miles from new. The cel light came on a few weeks ago almost immediately after I put gas in it. I took it to the Porsche dealer I bought it from, he reset it but said I was getting close to needing 4 new oxygen sensors, $800. I called another Porsche dealer & he told me that was BS! I put gas in yesterday & the lights back on an hour or so later. I am thinking a bad gas cap. Any ideas?
Last edited by rk1234567; 06-16-2009 at 04:48 PM.
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Old 06-16-2009, 04:03 AM   #2
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Change the gas cap. its cheaper than the O2 sensors. Did the dealers tell you what the codes are? It may be worth the money to get a OBD2 code reader.

And just for reference... my CEL is been on for 6 months. I read the codes and checked the forums... its emmisions stuff.

Sign up to http://www.renntech.org
to get the codes.

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Old 06-16-2009, 04:53 AM   #3
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take it to an auto supply store
Take your car to Autozone, or Advance. They'll scan the cel code for free.
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Old 06-16-2009, 05:13 AM   #4
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Quote:
Originally Posted by vath2001
Change the gas cap. its cheaper than the O2 sensors. Did the dealers tell you what the codes are? It may be worth the money to get a OBD2 code reader.

And just for reference... my CEL is been on for 6 months. I read the codes and checked the forums... its emmisions stuff.

Sign up to http://www.renntech.org
to get the codes.

Welcome.

You might want to attend to this emissions stuff anyway.

In the long run, it can't be good for your car or my air.

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Old 06-16-2009, 09:46 AM   #5
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I have a problem with the secondary air pump. Which means that the valve or switch are bad, and the air pump can not dump extra air into the exhaust allowing the car to pass emmisions tests when the engine and Cats are cold. So my car doesn't "cheat" right now.

The air is still safe. And I will correct the problem, its just not a priority right now.
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Old 06-16-2009, 04:22 PM   #6
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Got gas & replaced the gas cap, code was p1123. Drove around for a while, CEL is still on.
Last edited by rk1234567; 06-16-2009 at 04:32 PM.
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Old 06-16-2009, 04:49 PM   #7
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I had the same proble when I got mine. My mechanic checked it out and sure enough, its MAF sensor. I got it replaced and problem solved.

If you run with bad MAF sensor, gas consumption will increase and power as well.
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Old 06-16-2009, 05:03 PM   #8
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Is the MAF the same as oxygen sensor?
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Old 06-16-2009, 05:25 PM   #9
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Maf
Seems to be a different code to mine,
P1123 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Lean Threshold



P0101 Mass Air Flow Sensor
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