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Old 11-01-2009, 07:37 PM   #17
Scooby Newbie
Member#: 228683
Join Date: Nov 2009

I have a 2006 Subaru Tribeca with the same error codes P0011 and P0021. I was told that it was due to oil sludge build up from not changing the oil often enough!! Funny because I have the oil changed every 3000 miles. The last time they replaced the OCV valve and cleaned the oil sludge from the only 3000 miles later the same error codes have surfaced again and the car is running rough and surging......Any suggestions?
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