King848

Thanks ! I’ll do it and let you know if that worked

Thanks a lot all for your help. You mean I should remove the charcoal canister, empy it from the petrol that it contains and fit it again ? It's for the refueling problem right ? the excess of amount. Not for the fluctuating Lean-Rich condition or may be I am not understanding correctly. If the car is in total rich condition, when driving the STFT should be close to 0 or remains in negative ?

When you say the purge valve, is it the the evap purge valve ? If so I just put a new one. Also I didn’t have at any moment the engine light on the dashboard. Also when driving the STFT is normal… it’s only at idle that it’s negative as hell What the general mileage of this car ? The average that I should be having ? The fuel tank is 45 l right ? Because once I’ve filled that tank and it took 50,5 L… normal ?

I think so that the coolant temp sensor is the original one. The ECT is at 84-88 when warmed up. At idle it oscillates a little because of the leakage, I guess it influences a little

Mine’s a 2004 First registration in December 2004 Vin number : TMBHY46**********(01) I’ve drove the car for 300 km. 150km per trip. When I’ve done the first 150Km, I’ve done and obd scan. No code error and stft of -9,5 to -11,5%. Then I’ve done the trip back and done the scan … (drum roll) surprise code P0171 - system too lean … the opposite now with a STFT of -18 to -21%. I’m becoming mad… xD VIN obscured. Do not post your full VIN. This is to prevent cloning. Thank you. Briskoda Admin

Ohw, so it’s the bad sensor that I’ve took ?

My bad It’s 0 258 007 357 From what I’ve seen this part is compatible for AZQ motors. I could be wrong….

Thanks for your help ! For the reference, : old one has 03E 906 262 The new Bosch has : 0 258 007 35 The measurements are indeed seen on group 33. I haven’t watched the group 31

Nope still got the old one. Will post the reference after eating

My apologies I haven’t precised. I have replaced O2B1S1 by a new one from Bosch. Every sensors are connected ! I have checked the spark plugs and they are all 3 black … showing that there is indeed a rich condition. No oil or petrol on the spark plugs. They feel in good condition though. There are no misfiring.

Hi everyone, Hope you’re all doing well. I’ve bought a Skoda Fabia Combi 1.2 HTP - motor code AZQ - @ 115k km one month ago. After a day, I’ve noticed that the car has a rough idle, the inside of the car wobbles a little bit. In the first instance I thought it was may be normal after several restshowing that this 3 cyl is a little rough in idle. But I’ve put the OBDeleven into the obs port and P0172 was the code shown. So I’ve begun to diagnose it by myself. What I’ve found is : the evap purge valve was blocked in close position. When the car was cold there was no succion. After the warm up, the valve was still closed. Leakage of cooling liquid at the thermoswitch. But it’s not a huge leakage The fuel pressure at the rail measures 3,2 bars The MAP sensor shows a value of 45 kPa at idle. When put only the ignition, I have a value of 101 kPa. When reving the car, the value descrease at 25 kPa. The lambda value is close to 1 The O2B1S1 value was at 1.52 V and fluctuate a little but not much The O2B1S2 value vas at 0,74 V and goes to 0,78 V but doesn’t fluctuate much. The STFT was at -15% up to 20% The LTFT was at -3 to -4 % Before replacing anything, I’ve unplugged the B1S1 and the STFT went to 0%. The cars became a little smooth. So I guessed it was because of the sensor ! I’ve change the S1 and put the Bosch brand, changed the evap valve as well and changed the fuel filter (the filter was 22 years old …) After all that, the value were : O2B1S1 : 1 V but no fluctuations at all… except when reving … it goes to 3 V !!! O2B1S2 : 0 V StFT up to -20% No error code coming Rough idling I’m completely lost… I don’t know where I should look at… Also when the car is cold, sometimes it happens after that I’ve reversed or moved forward a little that the cars revs up automatically, like you put your foot on the gas pedal and release and same on some few times before it stabilizes Could you please help me a little with this ? Appreciate a lot ! Thanks in advance