Hi,
I purchased a Bluetooth Code Reader off EBay, and enjoy all of the extra engine data that is on my smartphone, especially the transmission temperature.
I live in coastal Virginia, relatively flat, and it usually indicates around 230 degrees F in highway driving. Yesterday, I noticed the transmission running warmer than normal, going up to 256 degrees, as well as noticing the engine operating at higher RPMs than usual. I went into the diagnostic mode while driving, and it had popped a P0740 code. Once reset, the RPMs went to normal and the temperature returned to the 230s range.
Is 230 degrees a normal operating temperature for this transmission? Would adding an external transmission cooler help preserve the transmission?
Seth Anderson
Moon, VA
2002 Jetta TDI Automatic 220K miles
I purchased a Bluetooth Code Reader off EBay, and enjoy all of the extra engine data that is on my smartphone, especially the transmission temperature.
I live in coastal Virginia, relatively flat, and it usually indicates around 230 degrees F in highway driving. Yesterday, I noticed the transmission running warmer than normal, going up to 256 degrees, as well as noticing the engine operating at higher RPMs than usual. I went into the diagnostic mode while driving, and it had popped a P0740 code. Once reset, the RPMs went to normal and the temperature returned to the 230s range.
Is 230 degrees a normal operating temperature for this transmission? Would adding an external transmission cooler help preserve the transmission?
Seth Anderson
Moon, VA
2002 Jetta TDI Automatic 220K miles