I have Seicento 1100cc, 2002.

On a 15 mile journey this week it started to cut out under load. It would still idle but not take a load. After switching off for about 2 minutes I could then continue about a mile or so when it started failing again.

I put the Multiecuscan on and it came up with exhaust sensor fault. I cleared the fault and the engine light did not come on but the fault is still there. To make matters more difficult I can no longer connect Multiscan.

The only diagnosis I can make is that it comes on with heat.

Can someone help please. I thought it might be the coils but don't want to replace unnecessarily.

Ive been chasing exactly this problem for a month.

Starts, won't pull up the drive. Force it and the management light comes on and away it drives.

Finally got IAW scan to connect and says Lambda fault

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Almost certainly needs a new pre-cat, oxygen (lambda) sensor. Check the wiring to it carefully first though.

Get a good one with the connector pre-fitted. Don't try to save money on a universal one that you have to splice in or fit your own connector, the voltages are critical so you don't need dodgy connections.

Thanks for your reply and advice.

They are all sorts of prices on ebay with wired connectors, this one seems to be as good as any other as I won't be keeping the car.

A dodgy lambda usually gives you a hesitation around the 1600rpm mark, where the lambda heater cuts off. If yours is a bit moody around there (accelerate through to 2000rpm slowly to check) then it should be the lambo.

It could also be ignition related, which means TDC sensor, coils or plugs. If you take the plugs out you can check for any that look a little bit random (sooty, oily or white etc.) compared to the others. It won't cost anything and gives you something to try while you're waiting for the new lambda to arrive..


Ralf S.

portland_bill said:

Almost certainly needs a new pre-cat, oxygen (lambda) sensor. Check the wiring to it carefully first though.

Get a good one with the connector pre-fitted. Don't try to save money on a universal one that you have to splice in or fit your own connector, the voltages are critical so you don't need dodgy connections.

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