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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars

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oxygen sensors V90

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Old Sep 13th, 2017, 09:27   #1
derek vivian
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Default oxygen sensors V90

Having had a complete new exhaust sytem fitted the garage mechanic also replaced the Oxygen Sensors with the correct ones for my car. My V90 has 2 one before and one after the Cat. Does anyone know if the ECM automatically adjusts to the new sensore or will I need it diagnosed by a Volvo specialist? I have a OBD-11 reader, but that's about my limit!

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Old Sep 13th, 2017, 11:01   #2
m0bzy
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I have just replaced the lamba's on my V90 and they were plug and play,I wonder why yours has three? I have just reread the original post,yes there are two and they were plug and play.
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Old Sep 14th, 2017, 15:19   #3
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If the ECU has fault codes stored you will need to clear them. You can just disconnect the battery to do this
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