Dauerhafte DPF Regeneration nach Zahnriemenwechsel | Posts 16+

Marco_mk75 wrote:

I'm just surprised that the pre-catalyst has a temperature of 700 degrees and the post-catalyst has a temperature of 200. Something isn't right; it can't lose that much temperature on such a short path, less than 500 degrees.

"Without a load, the downstream catalytic converter temperature is significantly lower. However, if you accelerate for a period of time, it will also increase. During DPF regeneration, the downstream catalytic converter can even get hotter because soot is being burned inside the catalytic converter."

Yes, I drove up to 200 km/h. At that speed, the S1 temperature reached 700 degrees, while the S2 temperature remained consistently at 200 degrees.

Marco_mk75 wrote:

Yes, I drove up to 200 km/h, and at that speed, the S1 reached 700 degrees, while S2 remained consistently at 200 degrees.

Okay, that's strange. Does the reading seem accurate when the car is cold?

Yes, it's the same when the car is cold.