Transmission Warning Light on and Surge

Diver · 10-13-2016, 01:13 PM

2012 135i, DCT, PPK, 23k miles, out of warranty.

This morning I drove about 5 miles, parked for 40 minutes and when I started the car back up the transmission warning light came on in yellow. The car drives normally except when slowing to a stop there is a throttle surge sometimes. The surge issue has been there for a while. AC is used daily at least 9 months a year due to the hot and humid climate.

Help!

Gangplank · 10-15-2016, 08:45 AM

Quote:

Originally Posted by Diver

2012 135i, DCT, PPK, 23k miles, out of warranty.

This morning I drove about 5 miles, parked for 40 minutes and when I started the car back up the transmission warning light came on in yellow. The car drives normally except when slowing to a stop there is a throttle surge sometimes. The surge issue has been there for a while. AC is used daily at least 9 months a year due to the hot and humid climate.

Help!

I'd recommend pulling the codes. I have the Carly app + wifi dongle for my iPhone. Or any Indy BMW shop can do it for you in a moment.

The codes will tell you what the error is and go from there.

Diver · 10-16-2016, 02:26 PM

Quote:

Originally Posted by Gangplank

I'd recommend pulling the codes. I have the Carly app + wifi dongle for my iPhone. Or any Indy BMW shop can do it for you in a moment.

The codes will tell you what the error is and go from there.

I am going to start with the dealer. Due to low mileage there is a chance BMW will participate in the cost. There is a chance all this needs is a reset and a flash.

The car has been driving normally except for an occasional surge at low speed and the light comes on every time I start it.

Gangplank · 10-17-2016, 07:55 AM

Do you have the PPK or any other tune installed? On my 2011 the DCT shifting smoothness improved after installing the PPK.

That said, if the light is on there is a code stored so I'd pull the code and start there.

Diver · 10-17-2016, 08:22 AM

Quote:

Originally Posted by Gangplank

Do you have the PPK or any other tune installed? On my 2011 the DCT shifting smoothness improved after installing the PPK.

That said, if the light is on there is a code stored so I'd pull the code and start there.

Car has PPK, no other mods other than non run flat tires.

Gangplank · 10-17-2016, 01:39 PM

Find a local Indy shop and have them pull the code. Most won't charge just to hook it up.

Diver · 10-18-2016, 11:48 AM

Quote:

Originally Posted by Gangplank

Find a local Indy shop and have them pull the code. Most won't charge just to hook it up.

The light did not go on Monday when I went to the dealer. They said no transmission codes were found, but the engine was running lean. They wanted to clean the fuel system for $189. I was not charged for the diagnostic. On the way home I stopped for gas and the light came back on. I put in a bottle of Techron injector cleaner. This morning the light did not come on. It appears the code clears when the light goes off.

Gangplank · 10-20-2016, 02:25 AM

Typically the code is stored until it it cleared. Honestly I highly recommend getting the Carly app and a OBDII dongle. It lets you read the codes and even code some things on the car if you like. Handy to have to read the codes yourself and then research what's going on.

quicksilver3121 · 10-20-2016, 09:41 AM

I take it they checked for fluid leaks? DCT is notorious for fluid seepage.

Diver · 10-20-2016, 04:45 PM

Quote:

Originally Posted by quicksilver3121

I take it they checked for fluid leaks? DCT is notorious for fluid seepage.

There are no leaks. There isn't so much as one drop of anything on my garage floor and the underside of the car is clean.

What I am hoping is the lean running of the engine caused some odd activity as the car was coming to a stop and it threw the transmission into an error. So, if the injector cleaner works the problem should go away. After 50 miles I noticed behavior while coming to a stop was much smoother. That is a worthwhile improvement.

quicksilver3121 · 10-21-2016, 10:12 AM

Gotcha. I had a boost leak which was causing me to run rich and had similar symptoms, sudden lurching and engine surging which was very annoying and unpredictable. I never got a transmission light but I only had the leak for a few days before getting it fixed.

Curious if it comes back though!

Diver · 10-21-2016, 10:20 AM

Quote:

Originally Posted by quicksilver3121

Gotcha.
Curious if it comes back though!

I hope not.

10-13-2016, 01:13 PM	#1
Diver Brigadier General 504 Rep 3,446 Posts Drives: Black '12 135i - Sold Join Date: Nov 2010 Location: Texas iTrader: (0)	Transmission Warning Light on and Surge 2012 135i, DCT, PPK, 23k miles, out of warranty. This morning I drove about 5 miles, parked for 40 minutes and when I started the car back up the transmission warning light came on in yellow. The car drives normally except when slowing to a stop there is a throttle surge sometimes. The surge issue has been there for a while. AC is used daily at least 9 months a year due to the hot and humid climate. Help! __________________ See my photography at http://ronscubadiver.wordpress.com
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10-17-2016, 07:55 AM	#4
Gangplank Brigadier General 1541 Rep 3,071 Posts Drives: 2011 e82 135i n55 Sport w/ DCT Join Date: Nov 2015 Location: Vero Beach, FL iTrader: (2) Garage List 2011 135i [0.00]	Do you have the PPK or any other tune installed? On my 2011 the DCT shifting smoothness improved after installing the PPK. That said, if the light is on there is a code stored so I'd pull the code and start there.
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10-17-2016, 01:39 PM	#6
Gangplank Brigadier General 1541 Rep 3,071 Posts Drives: 2011 e82 135i n55 Sport w/ DCT Join Date: Nov 2015 Location: Vero Beach, FL iTrader: (2) Garage List 2011 135i [0.00]	Find a local Indy shop and have them pull the code. Most won't charge just to hook it up.
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10-20-2016, 02:25 AM	#8
Gangplank Brigadier General 1541 Rep 3,071 Posts Drives: 2011 e82 135i n55 Sport w/ DCT Join Date: Nov 2015 Location: Vero Beach, FL iTrader: (2) Garage List 2011 135i [0.00]	Typically the code is stored until it it cleared. Honestly I highly recommend getting the Carly app and a OBDII dongle. It lets you read the codes and even code some things on the car if you like. Handy to have to read the codes yourself and then research what's going on. __________________ 2011 135i w/ DCT \| ZSP Sport Pkg \| PPK \| Ohlins R
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10-20-2016, 09:41 AM	#9
quicksilver3121 Private 30 Rep 74 Posts Drives: 2012 135 M-Sport DCT Join Date: Jun 2016 Location: NJ iTrader: (0)	I take it they checked for fluid leaks? DCT is notorious for fluid seepage.
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10-21-2016, 10:12 AM	#11
quicksilver3121 Private 30 Rep 74 Posts Drives: 2012 135 M-Sport DCT Join Date: Jun 2016 Location: NJ iTrader: (0)	Gotcha. I had a boost leak which was causing me to run rich and had similar symptoms, sudden lurching and engine surging which was very annoying and unpredictable. I never got a transmission light but I only had the leak for a few days before getting it fixed. Curious if it comes back though!
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