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Discussion Starter #1
I have a stock tune file for my car (to change the tire size in the computer, thats it) for my xcal2 (computer code XZE2). Everything works perfect, except when I put the car in reverse and back up, I get a CEL and every time its p0506. I don't get the code when driving in gears 1-5, only reverse. I have never gotten a CEL until I put the tune in the computer. The only change I have made to the car is different size tires from stock. Does anybody have any suggestions?

I have been trying to post at SCTflash.com, but the boards there have been down since November.
 

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Discussion Starter #2
Sorry, P0506 is "Idle Control System RPM Lower Than Expected"
 
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