pmcd1966

I'm starting to experience an issue when I first start the car in the morning. The transmission goes into limp mode (Red background on gear indicator). I have to restart the car to get it back to normal. I've researched and so far can only find issues where exposure to water will cause this. I don't think that's the case with my car. I've pasted the VAG-COM codes below.
If anyone has any thoughts I will greatly appreciate it. Hopefully this doesn't turn into something expensive. The car has been wonderfully reliable over the past 6.5 years. The only thing that I can think of is that my battery is getting a little weak and maybe it's not providing the voltage necessary on startup - just a WAG.


2 Faults Found:
18155 - Transmission Solenoid Power Relay: Open or Short to Ground
P1747 - 000 - - - Intermittent
Freeze Frame:
RPM: 0 /min
RPM: 0 /min
RPM: 0 /min
(no units): 30.0
(no units): 96.0
Temperature: 24.0°C
T.B. Angle: 0.0°
Voltage: 7.84 V

16946 - System Voltage: Too Low
P0562 - 000 - - - Intermittent
Freeze Frame:
RPM: 0 /min
RPM: 0 /min
RPM: 0 /min
(no units): 30.0
(no units): 96.0
Temperature: 24.0°C
T.B. Angle: 0.0°
Voltage: 7.84 V

pmcd1966

Realized I left out some details...
2004 S4 tip w/paddles with about 85K miles. All stock.

S4Bloom

Any word on the outcome of this?

541WRC

I have a 2004 S4 auto trans. with about 65000 on it. Whenever the car is not kept in a garage or it gets below freezing i get this same limp mode. After about 5 to 10 minutes of warming the car up it always goes away. I was told to replace this part you would have to replace the solenoid in the trans. Then the bad news it is about a 2000 dollar job. Ive just delt with it for a year, try to keep the car inside the garage and always warm it up in the winter. Good luck...

czellars

I am having this same exact issue with a 2001 A8 going into limp mode only when very cold. Runs well after warming up the car or if weather is above 20 degrees F

Any solutions?