GS-911 and ezCAN User Forum

Deutsch => Alles rund um die Elektronik und Steuerung => F Serie => Topic started by: MotEng on November 17, 2021, 02:30:19 PM

Title: 304: Oxygen (Lambda) Sensor Circuit Malfunction
Post by: MotEng on November 17, 2021, 02:30:19 PM
Hello all, while i was riding my bike started to misfire, on a stop noticed very rough idle. Plugged the GS911 and had the following error:304: Oxygen (Lambda) Sensor Circuit Malfunction!
Plotted the O2 sensor and noticed the flat line way under the minimum voltage!!! Replaced it with a new Bosch O2 sensor same error! Any of you came up with a wiring harness problem?
There is low voltage for sure but i cannot trace an earth short circuit! 
Title: Re: 304: Oxygen (Lambda) Sensor Circuit Malfunction
Post by: GS Jim on November 17, 2021, 06:20:48 PM
I think for anyone to help you you will have to post a minimum of information such as year and model and maybe the scan itself.
Title: Re: 304: Oxygen (Lambda) Sensor Circuit Malfunction
Post by: schuppi on November 17, 2021, 08:24:52 PM
Hello

If a measured lambda sensor voltage is smaller 0.1V , the engine is running extremely lean.
This also explains the poor running behavior.

Please check engine and intake system for leaks. 8)