I have a 2009 tl-Shawd and received a code P0507 after I cleaned out the throttle body with CRC throttle body cleaner and cleaned the MAF with CRC MAF cleaner. The same day I noticed an increase in parked idle speed and general acceleration which I was impressed and happy about but then a few hours later the sh-awd error light and emission error light came on. I disconnected the battery after a day hoping it was just carbon build up form the cleaning but code is still coming back up. Also I noticed it will go to front wheel drive mode only and I have to restart the car to get and again. Anyone know what this code is for and how to fix?

 

See article "MIL On With DTC P2279 or P0507 After Throttle Body
Servicing" on page 5 of the June 2013 Acura Service News.

https://acurazine.com/forums/third-g...8/#post8398357

 

Thanks for the info! Now i just have to figure out how to implement the fix.

 

If you don't have access to the Honda Diagnostic software/system.... based on past experiences with a J30 engine on an Accord, to fix this you need to do a couple of long deceleration (preferably on highway off ramps) with your foot off the gas. Shut it down/start it and after it cools down a few degrees get back on the highway and maintain a steady normal-highway speed. Sometimes the idle gets fixed like that and the ECU non-continuous emissions tests set the codes right and re-writes values in memory such as the throttle body valve position. Also, run the engine and let the fans start/stop twice, even though sometimes on the 4G TL, the 3.7 engine, won't heat up enough (over 90oC I think) for the fans to turn on.

Remember safety first, don't do any of these if there is traffic or you have drive ability issues with the car.