P0506 with nothing but stock tune, help!
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.
2007 Alloy Metallic Mustang GT w/5sp Manual Transmission, 17" Stock Rims, IUP, and Charcoal Leather Interior