Auto Start Stop shutting engine down before coming to a stop

**GR8UK** · 03-02-2021 03:31 PM

I'm relatively new to the Audi, I'm trying to track something down.

I've researched the forums, and there are a lot of people who indicate they are having the same problem. Coming to a stop, when the car gets to 2-3 MPH, the ignition shuts off which results in a jerk, or a long pause if the light turns green and I want to go again. I've seen a lot of posts where they encourage to remember to turn it off when the car is started. I'm usually juggling several things when I get in the car, and I forget. I also like the idea of the car shutting down at a long light or waiting for a train.

I took the car to the dealer, they said it is operating "normally, all systems check out". I told the service advisor "let's go for a ride". I demonstrated what happens, he went back to saying all systems are functioning properly.

Is there a fix? It's so incredibly annoying.

**Esmin23** · 03-02-2021 03:37 PM

I managed to tame that down with a Tranny insert. Made a big difference. a relatively cheap mod that's very easy to install.

**SHCKR** · 03-02-2021 04:08 PM

You can disable auto start stop permanently via obd11 (must have ac on), a hardware dongle, or an ECU tune. No way that I've seen to have it shut off at 0 mph instead of 2-3.

Sent from my Pixel 3 XL using Tapatalk

**YoYo** · 03-02-2021 04:29 PM

Or drive in "S".
I was always in "S" before the tune so I have never used auto start/stop. I'm sure that is annoying though.

**RoverJoe** · 03-03-2021 08:05 PM

This is a normal "feature" of the VW group eco stop/start, it is supposed to kill the engine while coasting to a stop with enough brake pressure applied. Yes, if you catch it at the wrong moment there is a lag and a delay, and it's not the smoothest system largely due to a V6 that isn't that smooth to begin with. There won't be a fix for it sadly other than avoiding the conditions that trigger it or turning the eco stop/start off.

**A4B7Avant** · 03-04-2021 10:06 AM

I just discovered this...

Pressing the brake pedal too hard will cause the Start/Stop feature to trigger even when the car is at a complete standstill.

**RoverJoe** · 03-04-2021 07:42 PM

Yep there is a trigger point for brake system pressure, if you are very light on the pedal it won't turn the engine off, but if all other conditions are met and then it sees enough brake pressure, it can kill the engine even when you are already stopped. Same with a restart. You can ease off the brake but not fully release, the engine will restart below a certain point (usually like 10 bar of pressure or something low), even though on flat ground that's still plenty to hold the car. Sometimes the start and initial torque hit will allow the car to start rolling though, depends on the car and conditions.