Trans Fail Safe HELP X5 2005 4.8is

[jac]

Ok. Cleaning the MAF did not solve it. I spent nearly half the can on it too and left it drying over night...

So, I am buying a new MAF... It gets here tomorrow. We'll see...

[StephenVA]

Good Luck and keep us posted on the out come as it may help others....

[X53Jay4.8is]

Originally Posted by jac

Ok. Cleaning the MAF did not solve it. I spent nearly half the can on it too and left it drying over night...

So, I am buying a new MAF... It gets here tomorrow. We'll see...

Woe woe woe, you may have a bad wheel speed sensor since this was one of the original codes. Another area that could cause the trans failsafe is the ABS/DSC module. I just had this problem with my X5 where it was the ABS/DSC module causing the fault. My vehicle had codes for 2 wheel speed sensors. Highly unlikely both would be defective. So I used the live data on my scanner to see which wheel sensors were not reading. Switched the wheel speed sensors on the vehicle and no change in operation observed thus confirming a fault in the ABS/DSC control unit.

[bcredliner]

Originally Posted by X53Jay4.8is

Woe woe woe, you may have a bad wheel speed sensor since this was one of the original codes. Another area that could cause the trans failsafe is the ABS/DSC module. I just had this problem with my X5 where it was the ABS/DSC module causing the fault. My vehicle had codes for 2 wheel speed sensors. Highly unlikely both would be defective. So I used the live data on my scanner to see which wheel sensors were not reading. Switched the wheel speed sensors on the vehicle and no change in operation observed thus confirming a fault in the ABS/DSC control unit.

I wouldn't chase the cause with new parts. Keep troubleshooting. It may or may not be the MAF, battery, alternator, wheel sensor etc.