[daver]

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

 

[rick45]

hi,
check to make sure plug is good fit also check for any other loose wires you may have dislodged.

 

[daver]

Thanks, but all wires and connectors are ok.

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