PLEASE HELP. I have a skoda fabia mpi estate aqw engine code car and two month now I am trying to fix the emission problem after failed on Mot. The CO 1.697, 0.950 lambda

What I have changed so far: thermostat, coolant, genuine: coil unit, plugs rear lambda map sensor, manifold gasket, air hose with new clips, cleaned throttle valve. cat test with vcds ok, front lambda a bit slow but ok, cylinders pressure checked ok,

No fault code. Previous fault codes 17564, 17549, and

16588 - Injector: Cylinder 4 (N33)

P0204 - 35-10 - Circuit Malfunction - Intermittent

16587 - Injector: Cylinder 3 (N32)

P0203 - 35-10 - Circuit Malfunction - Intermittent.

At the moment. Last emission control the CO was 1.300. on fast idle after I changed the above parts. The electrician told is not overfueling the engine.

Wednesday,13,February,2013,20:51:55:37412

VCDS Version: Release 11.11.0 (x64)

Data version: 20111111

Address 01: Engine (047 906 033 H)

20:51:52 Group 046

1408 /min RPM

408.0°C Temperature

0.84 (no units)

Cat B1 OK

Coolant temperature sender checked working fine was increasing 1.5 C and the thermostat was opened on 88 C

Address 01: Engine (047 906 033 H)

08:34:13 Group 004

768 /min RPM

13.33 V Voltage

84.0°C Temperature

45.0°C Temperature

Thanks.

The probable causes for these codes are:

• wiring
  
• injector
  

I'd be inclined to carefully check the wiring before condeming the injectors.

SN