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Discussion Starter · #1 ·
Apologies for coming straight in with a question but my wife has a fiat 500x that has thrown a P1030 error code out. I’ve identified that it’s a bank 1 sensor 1 issue, which is the pre cat sensor but I wanted to ask which one it is as there appears to be two sensors at the top of the exhaust manifold itself.

is it the larger of the two or the smaller one. The smaller one seems to match the sensor below the cat so I’m thinking that one.

Normally I’d check a microfiche for the location and parts number but getting hold of a fiat 500x parts diagram is pretty much impossible.

I’ve also tried Fiat directly but they were rubbish and no help at all.

any help from the forum would be really appreciated.


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