I had no codes present or EML light on

My Snap-On Solus ultra was able to "live read" the engine sensors etc

What I found was the Lambda gave a flatline constant reading regardless of revs, load, emmissions etc etc BUT because it was inbetween the minimum and maximum permitted parameters the ECU did not register a fault and therfore did not store a code or put a warning lamp on.

After replacing the lambda the "live reading" gave a "peak and trough" reading that altered with the engine load, speed, throttle position etc

As said before all is now perfect and better fuel consumption

Have found this on http://www.sparkplugs.co.uk/pages/pr...Sensor-ccp.asp

Front Sensor



Rear Sensor