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2011 DTS
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30 Posts
That code is showing the ECU is detecting evap purge flow when it's not supposed to be flowing. Most likely cause is a bad evap purge valve. To test remove the valve and blow through it. If you can blow through it, then it is junk. The purge valve (solenoid) is located on top of the engine toward the throttle body. One bolt holds it down, it has a 2 wire connector and a plastic line with a quick disconnect. I had the same issue last month.

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