rmad27 Posted April 16, 2010 Share Posted April 16, 2010 Hi all, My 03 model Fiesta (1.25LX) recently started showing the engine warning light on the dashboard. I took it in to the local Ford dealer who reckoned it needed a new catalyst and pre-cat hego sensor. The last MOT (last month, before the warning light came on) was fine except the Natural idle test showed the CO percentage right on the wire - 0.30%vol. I'm minded to try changing just the sensor, to see if that makes any difference, especially as I can pick one up on the web for much less than the dealer quoted me. I've therefore two questions for the forum: i) Is this a sensible thing to do? ii) How easy is it to fit a new sensor - is it something that I can do myself with an afternoon to spare? Any and all advice gratefully received! :) Quote Link to comment Share on other sites More sharing options...
DONFRAMAC Posted April 17, 2010 Share Posted April 17, 2010 Hi all, My 03 model Fiesta (1.25LX) recently started showing the engine warning light on the dashboard. I took it in to the local Ford dealer who reckoned it needed a new catalyst and pre-cat hego sensor. The last MOT (last month, before the warning light came on) was fine except the Natural idle test showed the CO percentage right on the wire - 0.30%vol. I'm minded to try changing just the sensor, to see if that makes any difference, especially as I can pick one up on the web for much less than the dealer quoted me. I've therefore two questions for the forum: i) Is this a sensible thing to do? ii) How easy is it to fit a new sensor - is it something that I can do myself with an afternoon to spare? Any and all advice gratefully received! :) Those sensors can sieze in place and need a bit of heat (blow-torch) to free it off. I would be tempted to use "FORTE" brand petrol system cleaner, at £8.50p + VaT, for a bottle which treats 100 litres of fuel. It will clean the whole system-- injectors, oxygen analyser probe etc., and restore good emissions. I used the diesel version for 8 years, and am now on the version for most petrol engines. There is also a version for the early ZETEC-S engines, to address the sticky-valve problem they have. (pre-Mk 6, they had hydraulic tappets.) The product is trade-only, and I buy mine from my local Ford dealer, where it is used at services. Quote Link to comment Share on other sites More sharing options...
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