Hello guys, i have a CLS W219 3.5V6 CGi i think MED9.7...
Before few days light turned on off check engine lamp and here what diagnostic says.
- front catalys block 2
-0412 heating of NOX sensor behind catalys block 2
So...idle speed is 580 R.P.M is ti too low?? temperature of exhaust gases is 480°C in both tubes when i run engine on 3500R.P.M approx 3min.
Both Lambda (O2) sensors are with 5 wires,and i read voltage 1.0v - 1.1v but i think must be from 0.1 to 0.9V in waves
With osciloscope i read some different measurements but is not good
All heaters in exhaust is turned ON
I change spark plugs, oil filters blah blah blah...and have still problem.
MAF sensor is i think good, in idle 14kg/s on 3000RPM is 450kg/s
I feel gasoline throught exhust, so i think mixture is too rich????
Im mechanic but specialist for Diesel engines and diesel injection pumps and injectors.
HELP please
Before few days light turned on off check engine lamp and here what diagnostic says.
- front catalys block 2
-0412 heating of NOX sensor behind catalys block 2
So...idle speed is 580 R.P.M is ti too low?? temperature of exhaust gases is 480°C in both tubes when i run engine on 3500R.P.M approx 3min.
Both Lambda (O2) sensors are with 5 wires,and i read voltage 1.0v - 1.1v but i think must be from 0.1 to 0.9V in waves
With osciloscope i read some different measurements but is not good
All heaters in exhaust is turned ON
I change spark plugs, oil filters blah blah blah...and have still problem.
MAF sensor is i think good, in idle 14kg/s on 3000RPM is 450kg/s
I feel gasoline throught exhust, so i think mixture is too rich????
Im mechanic but specialist for Diesel engines and diesel injection pumps and injectors.
HELP please