Exhaust
Exhaust: 8 pieces on carscan.app — what it means, what to look at in the live data and where to start. Open and free, no app needed.
Secondary air: P0410, P0411, P0412 and the emissions test
The car drives fine, fuel use is normal, nothing rattles — yet the check light is on and the emissions test fails. That is what a system working for o
6 September 20264 min
AdBlue and urea: codes P203B, P2047, P204F, P20EE
The dashboard shows «AdBlue» with a countdown in kilometres and the scanner returns a urea code. The countdown ends with the car refusing to start — a
6 September 20264 min
Catalyst: how long it lasts and how to tell it is dead
P0420 is not a death sentence. What kills a catalyst, how to tell a dead one from a wrongly blamed one, and what actually follows a «delete».
5 September 20264 min
A diesel in winter: glow plugs, the DPF and the fuel
A diesel has its own winter rules. Here is what is normal and what should not be put off.
5 September 20262 min
The diesel particulate filter: signs, regeneration, codes
The diesel got sluggish, consumption is up, the fan roars when parked. Here is what is happening and how to help.
5 September 20262 min
Failed the emissions test: what to do
Turned away at the test station. Here is what exactly failed and which of it is an evening's work.
5 September 20262 min
P0401: the EGR valve is cleaned more often than replaced
Insufficient recirculation flow. In most cases that is soot, not a dead part.
4 September 20263 min
Fault code P0420: the catalyst or just a sensor
The most expensive-looking code in the book. And the most common case of replacing a thousand-dollar part for nothing.
3 September 20263 min