Hi fellas...I'd like to hard reset my ECU, but disconnecting the battery wires and leaving the car over the night like this doesn't help too much.

Is there a way to perform this by using VCDS, maybe via engine coding or something?

My pre-cat O2 sensor keeps spitting errors, even after it has been replaced .. and replaced .. with parts that have been searched by the car's VIN. The wiring is fine, the probe is brand new, on a different car, with the same engine it's working perfect, we've tested that too, but on my car, for some reasons, it's not working. It keeps saying it's a mailfunction in the circuit somewhere.

 

16514 - Oxygen (Lambda) Sensor B1 S1: Malfunction in Circuit

P0130 - 35-00 - -
17584 - Bank1: O2 (Lambda) Correction Behind Catalyst: Control Limit Reached
P1176 - 35-00 - 

 

The tech from Skoda rep. informed me that I should remap my ECU, update the maps, re-code it or something like this and if the problem will perssists, that I should replace the ECU.

Here's how to reset the ECU fully.

 

http://www.briskoda.net/forums/topic/201016-how-to-reset-the-engine-ecu/

Should I run this also ?

 

Ross


Does this info apply for all models ??


So in VCDS engine controller> 00 run adaption = reset values ???

 

I've reseted the ECU via VCDS mode and left the engine to idle for about 45 minutes. The interesting part is that the error

 

'16514 - Oxygen (Lambda) Sensor B1 S1: Malfunction in Circuit

P0130 - 35-00 - -' 

 

went away and didn't come back .. as long as the engine was running and me playing with the VCDS options. 

I've also ran the B1S1 / B1S2 tests, the first one came as OK, but B1S2 is not ok. My question is: logically, the second oxygen sensor, should have any active roles in the exhaust system ? If it's damaged, would it be normal to have excesive HC emissions along with a rich fuel mixture ? Shouldn't this be controlled via the 1st O2 probe ?

 

Second of all, what login code should I use to access the other features from VCDS? It's mentioned in the ross tech wiki that the codes should have been provided in a factory service manual. I checked Haynes, but couldn't find anything.

Pretty sure your right,first probe tells the ECU what to do,second one measures what the CAT is doing,ie its working correctly.

I should come with an update after all .. 'VCDS engine controller> 00 run adaption = reset values' seems to be working .. and no more errors in the last 24h. I will leave it like this for a day or two, and will try to change a bit later the gears, to keep the rpms anywhere near 3000..I wanna burn all the waste that I'm sure that's present in by catalyst .. and then maybe I'll get it anal probed and check the emissions. Keep your fingers crossed  :think: because IMO, it seems the best way to fix a Skoda is on the driveway, with a laptop, wireless Internet access,VCDS and patience...(lots of it).

anal probed

 

I'm not sure that means what you think it means

Basically I'd do as per my thread which has been linked to.....eg disconnect battery...............and also do the erase fault codes in VCDS.

 

The only reason for the second sensor is as follows:- the first one to read the emissions, then the second one (after all the cats) to read & make a comparison to the first. It then looks for a set % scrub (cleaning) that the cats should have done to the emissions read by the first.