Hi gang. Flashing coil light but not limp mode. I did a scan and this is what it came out. Worth saying I noticed a slight power drop, 2nd and 3rd had a nice pull, but now not so much. 

 

What do I need to replace?

 

1.6tdi 98000

changed MAP, all sorted

Had the same codes with my 2012 1.6tdi Yeti. Changed the MAP sensor, put a bottle of Wynns Turbo Cleaner in with 40lts of premium diesel and did around 100 miles keeping above 2500 rpm. Still the same, limp mode at random times EML light on.

4 hours at a local garage and they identified a faulty diaphragm in the EGR water cooler actuator. Quick fix was to blank off the vacuum hose to the actuator (it's the same vacuum circuit as the variable vane actuator on the turbo). 

The EGR cooler doesn't look to have been working for a while so I'm going to run it for a while before I make the decision to replace it. 

Not sure if anyone has posted this issue previously, apologies if I'm duplicating.

 

the coil light has multiple meanings so by the sounds of it yours its a turbo/EGR issue wuch seams to be common on these cars. Thanks for sharing

Hi Bertie90

Initially I had a P0299 but after the turbo cleaner, and the Italian tune up on the M65, I was getting these

============1==============
P2563
Raw code: 2563
ECU: Engine control unit
Status: Pending
OBDII: Turbocharger (TC) boost control position sensor - range/performance problem
============2==============
07286
Raw code: 001C76
ECU: Engine control unit
Status: Test failed, Pending, Test failed since last DTC clear, Test not completed during this operation cycle
 

Plugging the end of the vac hose, at the EGR cooler, has sorted the fault codes and limp mode. The Yeti has done 98000 miles so am a bit reluctant to replace the EGR cooler as there's a lot of dismantling (money) to get to it.

Not sure exactly what the vacuum actuator does, in the EGR cooler. Do you know if it's a separate function to the actual EGR valve?

to put it in prospective, my EGR failed at 50k miles for various reasons, short journeys by the previous person (I bought it at 30k) the emissions update etc...

This egr system is a bit complex and talks to a lot of other modules/systems which impacts limp mode.

 

There is no simple fix apart from replacing with new, or removal all together + blanking off + remapp, then DPF removal etc etc.

 

I would suggest starting a new topic, as many of us have lots of advice/opiniomns about it.

 

And the actuator must have something to do with opening and closing a valve either to the intake or through the cooler, not sure as the EGR has a direct impact on the DPF. #complicated

22 hours ago, Bertie90 said:

to put it in prospective, my EGR failed at 50k miles for various reasons, short journeys by the previous person (I bought it at 30k) the emissions update etc...

This egr system is a bit complex and talks to a lot of other modules/systems which impacts limp mode.

 

There is no simple fix apart from replacing with new, or removal all together + blanking off + remapp, then DPF removal etc etc.

 

I would suggest starting a new topic, as many of us have lots of advice/opiniomns about it.

 

And the actuator must have something to do with opening and closing a valve either to the intake or through the cooler, not sure as the EGR has a direct impact on the DPF. #complicated

 

You can fit one of these if you want to disable the EGR.

https://www.ebay.co.uk/itm/09-EGR-AGR-Valve-Simulator-Emulator-Plates-for-VW-Audi-Skoda-Seat-1-6-TDI-CR/183869312895?hash=item2acf770f7f:g:A9gAAOSwqPFdHF~4

 

No remap or other changes needed.

 

 

Thank you, some useful info there.

Bertie90, the actuator diaphragm that's failed is the one that sends the recirculated gases either through the cooler, or the 'uncooled' pipe. Not sure what the default position is, cooled or uncooked, so I'll run it for a bit and keep an eye on temperature and mpg. Hopefully it's stuck on the cooling side 🙂

I see, ok interesting device. I wonder if anyone on here used one of those before.

I used one on my son's Tiguan when the EGR started to act up, but that is on a 2l engine, so slightly different.

 

But it has worked 100% since fitted about a year ago.

7 hours ago, Yeti_Kev said:

Thank you, some useful info there.

Bertie90, the actuator diaphragm that's failed is the one that sends the recirculated gases either through the cooler, or the 'uncooled' pipe. Not sure what the default position is, cooled or uncooked, so I'll run it for a bit and keep an eye on temperature and mpg. Hopefully it's stuck on the cooling side 🙂

Default position is the 'uncooled' side. The actuator isn't sold separately, it's only a complete EGR cooler. Next step is to pull the actuator rod so the gases are going through the 'cooling' side. Preference is to have the recirculated gas 500 to 1000 degrees cooler, hopefully there's less chance of any residual damage...