Excessive carbon monoxide in exhaust

[redoubtable]

Hi there,

My car (2003 Seat Ibiza 1.2 Petrol) has failed its MOT for high carbon monoxide emissions after the 2nd fast idle.

I don't have the exact figures, but the car has noticeably been using more petrol recently.

I was planning to get the oil, oil filter and air filter changed, add some additives, take it for a good spin and then get it retested.

But since then it has been hooked up to the diagnostic computer, and returned the following errors:


Address 01: Engine Labels: Redir Fail!


Part No: 03E 906 033 P Component: 1.2l/4V SIMOS3 00HS4729 Coding: 00061 Shop #: WSC 06402 VCID: 2D5AD94BE7194670BA3 VSSZZZ6LZ4R048484 SEZ7Z0C21554072

Faults Found:

16804 - Catalyst System; Bank 1 P0420 - 35-10 - Efficiency Below Threshold - Intermittent

17511 - Oxygen (Lambda) Sensor Heating; B1 S1 P1103 - 35-10 - Performance too Low - Intermittent

Readiness: 0000 0000

Could anyone explain these errors and what action I should now take?

Many thanks.

[Guest 2]

16804/P0420/001056 - Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/16804/P0420/001056)

17511/P1103/004355 - Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/17511/P1103/004355)

[redoubtable]

Thanks. I'm aware it is likely to be the Lambda sensor- but am interested as to whether people think I should replace it straight off, or whether the less drastic action might yet see it through the MOT.