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Q: lambda sensor fail passing mot

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i dont know witch one to change front or rear

Hello. Without being there to inspect your vehicle or to read the scanner codes ourselves, it’s hard to tell you which one to replace. I’d recommend having a professional mobile mechanic from YourMechanic.com come to your location and complete a check engine light inspection. This will allow them to download all error codes and pinpoint what is damaged and what needs to be replaced or repaired.

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