We have a year 2000 Citroen Xsara with fault code 42-02 sensor circuit, this car has done 81000 miles, the customer has put a new cat on it, has had a NGK lambda sensor, also has put a new £15 coil pack on it.
The readings on the cryton gas analysis was
First fast idle test
co level 0.98% (Should be max 0.30%)
hc level 222ppm (Should be max 200ppm)
lambda 1.03 ( Should be 0.97 - 1.03
Second fast idle test
co level 1.00% (Should be max 0.30%)
hc level 248ppm (Should be max 200ppm)
lambda 1.02 (Should be 0.97 - 1.03)
Natural idle test
co level 0.74% (Should be max 0.50%)
Lambda sensor was working on live data.
Any help would be great.