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Discussion Starter · #1 ·
57 plate 1,6 petrol zafira, approx 40000 miles.
Emission light came on last week and car started running rough.
I assume front o2 sensor in manifold is u/s as engine sounded like the mixture was too rich (misfire etc)
I have changed sensor (aftermarket part) and car won't start.
It turns over but won't start.
I have left the battery disconnected overnight to reset ECU, but it makes no difference.

Any ideas?

Thanks
 

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Discussion Starter · #3 ·
Thanks, but all wires and connectors are ok.

I will replace original sensor tomorrow and at least see if it will start.
 
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