2004 Mercedes Benz CLK500 OBDII code P2098

2004 MERCEDES BENZ CLK500
35,000 MILES
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BILLYBAROO
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I drive to work in the morning about 20 miles and the code is not there. I drive home after work and after about 10 miles the cel comes and the P2098 code is stored. I had to put mid grade in the car about a week ago. Would this cause the problem?
Aug 16, 2013 at 5:44 AM
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JACOBANDNICKOLAS
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Are you sure that is the correct code? It isn't on my list.
Aug 18, 2013 at 9:18 PM
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BILLYBAROO
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The code was retrieved from an Actron code reader. It has to do with the post cat to lean. It actually was on both sides. Codes 2098 and 2096.
Aug 19, 2013 at 3:34 PM
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JACOBANDNICKOLAS
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If the engine is running lean, check for vacuum leaks on the engine.
Aug 19, 2013 at 5:06 PM