TDI in limp mode: Troubleshooting guide

'When I start my car with Katem, it runs normally. However, if I let it warm up, then turn it off and try to start it again, it briefly revs up but has no power. After about half a minute, my warning light starts to illuminate.'
What could be the cause? Could it be due to the cold outside temperature, or something else? Please help me.

... after about half a minute, my indicator light starts to light up...




It's best to have the error memory read out to get at least a starting point for troubleshooting.

It would be very helpful, for example, to know the vehicle type and the corresponding engine code. If you use the search function with the 'magic word' to search extensively, you should get some initial clues! And which warning light is illuminated? Is it the one for the windshield washer fluid, or the 'please go to the next gas station' light?