Garage replacve only 2 of the 3 lambda sensors? - Alfa Romeo Forum
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Garage replacve only 2 of the 3 lambda sensors?


I recently posted regarding an error message coming up on the dash, car is under warranty so took it back to the garage and they had it on the diag machine, came back that the lambda sensors were causing the problem. The guy was sound, said he'd ordered 2 new lambda sensors and got the proper bosch ones, called me today to say he had fit them and it had removed the fault message from the dash...but he realised there were 3 lambda sensors and not 2 as he originally thought.

He said to take the car as it seemed to have sorted the fault and if I had the light come on again to bring it back and they would replace the 3rd sensor. So I'm picking it up today and can't wait to get it back because they gave me the crappest daewoo car I have ever seen as a courtesy car. Should I insist they replace the 3rd one or if it has sorted the fault just leave it? I haven't had to pay for anything because of the warranty and there is 3 months left on it.

Cheers for any advice.
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if garage knows what they are doing they would know that the two in manifold are regulating and 3rd after cat is diagnosing, in other words if they can read the trace it would tell if 3rd is working
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