Exhaust emission warning lamp

[hod]

Dear All,
the exhaust emission warning lamp (yellow, engine shape) has been coming on intermittently (not blinking) and now stays on permernently.The guide book says its a lambda probe fault or o2 sensor, when I took the passat into a garage they said it could be a lot of things and not predominently the probe, they then said that they reset the computer, this cured it for a while but now the light has come back on, any ideas or is it mainly the probe that causes this light to come on,
cheers hod.

[sr-performance]

Hi mate, didn't they do a diagnostic check on it before clearing fault?
Quite possibly is the lambda but I would have it checked at a different garage...

[Crasher]

Have it read again and this time insist on a print out.

[limecc]

Depends on your confidence, but for less than £15 it may be better to get a Fleabay OBD2 lead to do some DIY reading.

[ST.Alban]

Dear All,
the exhaust emission warning lamp (yellow, engine shape) has been coming on intermittently (not blinking) and now stays on permernently.The guide book says its a lambda probe fault or o2 sensor, when I took the passat into a garage they said it could be a lot of things and not predominently the probe, they then said that they reset the computer, this cured it for a while but now the light has come back on, any ideas or is it mainly the probe that causes this light to come on,
cheers hod.

I had a similar issue on my 2ltr 2001 passat,

after a check at my mechanic we found out that the problem was with the battery and not with the engine or exhaust system.

Worth a check, if your battery is weak, change it and see what happens