Thread: D3. Transmission fault. Limited gears available.

Forgot to mention. On Saturday the car did a bunch of water crossings. But it drove fine during that time and on Sunday. Didn't drive it yesterday. I doubt that has anything to do with it. And I just had a clock spring replaced today under dealer warranty. Though that appears to be working just fine.

Maybe just a random error?

Oops. Forgot to mention the engine light error code was U041 or U0041. One or the other.

I just assume this code and engine light was related to the so called '''transmission fault''' error message since it happened simultaneously.

When I cleared that code the engine light disappeared.

What the heck is this code?

As I found out myself, the transmission fault could be a flow on from the engine fault and most likely is . Could be possible you got moisture in 1 of your connectors.

I guess if they continue to appear then you may have to do some more investigating. Be helpful to record the fault code if it happens again


Cheers Ean

Google is your friend.

Check OBDII diagnostics. Trouble code definition for code U0041. Causes of error U0041

Tells me "vehicle com bus B high"

Its a generic obd2 code. You'd have to log the error code from the transmission to know what caused the original code.

Transmission codes are related to the valve body and mechatronic unit, plus the transfer case. If you've gotten water up into the Transfer case control unit, (mounted high up on top of the TC) it could be a short or loose wire there.

Just my 2c worth

Thanks guys. I'll keep an eye on it. Hopefully it's nothing costly.

Unfortunately I only have a eBay $7 dollar code reader so that's why I can only read that generic code and no deeper. May have to fix that.

Funny how the transmission performed flawlessly grinding up steep rubbly hills on the weekend but throws errors in my driveway??? Ha.

You know this, but get a dedicated LR reader such as the IID. Worth its weight in gold both to avoid expensive servicing and to get you out of trouble in the outback etc.

Hi DJ. Yeah, I'm definitely going to do that once a few more dollars roll around. Is the 'iidtool bt' is sufficient?

Thanks. M

Originally Posted by Markus1

Hi DJ. Yeah, I'm definitely going to do that once a few more dollars roll around. Is the 'iidtool bt' is sufficient?

Thanks. M

Imo the best.