Your theory may be correct, it fits the symptoms. However, because the factory tune (and the OTS tunes are based on it) compensates quite a lot for fueling deviations and because load never goes high enough we may not be able to see a leak. I suggest to check both the silicone couplers going from t...

Well, replaced it with the OEM version. Now driven about 1300km since then, and code is gone, light is gone and running well!

Thx a lot Mituc!

Thanks a lot for your advice!

The only one I had available at that time was aftermarket. I'm guessing that is indeed the problem.

Tomorrow morning I will replace it with a brand new Mazda OEM thermostat.

Will post here how it works out after several 100's of KM.

Thanks again!

Thanks! Well, I replaced the thermostat about 3 months ago and worked perfect then (before that I had the same code). Today I replaced the sensor, but still the same. No overheating, just slowwwwwly getting warmer and temp dips as well. Buy another thermostat? Or is there something I can log? This w...

Hi all, Last week I removed my EGR and installed the Damond Motorsports EGR Valve delete kit (or actually EGR Full removal kit, but noticed that a previous owner already added the small extra plate). After I while I got the P0126 again. Had this code about 3 months ago, then I replaced the thermosta...

Hi!

Sorry for the old topic bump, but I'm also curious to this feature. I don't have an alu plate to fit to size as an EGR plate and don't know if there's anything else that would need to be done. A software feature to close off the valve would be awesome.

Thanks!

Alright, code + light on again.

Will check the pipe fron the EGR to the Intk this weekend. That might also be causing it from what I'm reading.

Hello, I had the same error after installing versatune. I also thought it was coincidence. Then later I installed a egr block off plate and disabled the error. Now because of other reason I removed Versatune from my car but I let the block off plate installed and I don't get any errors. I don't kno...

Hi Mituc, thanks for your reply! :]

The thermostat was open and with a new one, it was good .

The code I am getting now (or at least; yesterday before other tune) is: P0401 flow insufficient. I don't have a block plate and cleaned up my EGR yesterday.

Hope to hear your thoughts!

Stijn

In the meanwhile after running the tune for about 2 weeks: - Got a yellow light after about 100km which had to do with a stuck thermostat - After that got a yellow light about a exhaust flow not good enough (Google pointed me towards an unclean EGR). So I cleaned the EGR, but light still there. Now ...