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[micoandmojo]

  hi is it true that there are 4 lambor cencers a/b offside and a/b nearside

[aaronjb]

Yes. Well, they're called 'lambda sensors', but yes there are four.

[Webby the Bear]

Yes. Well, they're called 'lambda sensors', but yes there are four.

what are lambda sensors? i nnoticed this on my mot cert.

[aaronjb]

They measure the amount of oxygen in the exhaust gasses and, by that, the air/fuel ratio of the engine - they keep it running efficiently and producing the designed amount of emissions.

That's the simple explanation, anyway, for the complicated version of things like Nernst Cells: http://en.wikipedia.org/wiki/Oxygen_sensor

[Webby the Bear]

They measure the amount of oxygen in the exhaust gasses and, by that, the air/fuel ratio of the engine - they keep it running efficiently and producing the designed amount of emissions.

That's the simple explanation, anyway, for the complicated version of things like Nernst Cells: http://en.wikipedia.org/wiki/Oxygen_sensor

cheers aaron 

[TheBoy]

2.0l has 1
2.2/2.5/3.0 have 2
2.6/3.2 have 4

[aaronjb]

2.0l has 1
2.2/2.5/3.0 have 2
2.6/3.2 have 4

Good point.. OP has a 2.6 so I didn't really concern myself with the other models

[micoandmojo]

how can you tell what one is away, do you need computer

[TheBoy]

how can you tell what one is away, do you need computer

What is your fault code...