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Bought new 06 RL. Past two yer I go through this seaquence, fil the gas tank up. At 3/4 tamd the vtm-4 light and check engine lights come on. After a few mils the vtm-4 light goes off. Another 1/8th tank and check engine light goes off. Sometimes truck has a little rough idle when cold but then runs as it did new. 21mpg hy and 17 city. No misses all the power I have always had. Took into parts place and had scan done. These are results p0175, po303, po304, po305, po306,po300,po302,po301. Anyone have this problem or any suggestions what might be going on? As I said, truck runs fine just annowing lights.
Thanks in advance for any suggestions guys.

Safe travels all
 

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P0175 Front bank (bank 2) fuel system to rich
P0301 - P0306, Random Misfire detected cylinder 1-6

You need to have the fuel pressure checked according to the manual for starters I would think.
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Running a rich mix is hard on the O2 sensors and catalytic converters and can cost you more down the road the longer this condition continues in my opinion.
 
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