mat d Posted October 20, 2014 Share Posted October 20, 2014 My girlfriends '07 1.6 petrol focus' engine light has come on while driving, I checked the oil then topped it up to no avail. The fan comes on and is pretty loud but there is no noticeable loss of performance when accelerating, is it safe for her to drive for the time being? Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted October 21, 2014 Share Posted October 21, 2014 To be honest, the issue could be as small as a missing sensor, or it could be worse. You really need to get an error code from the car to start pointing in the right direction. Quote Link to comment Share on other sites More sharing options...
mat d Posted October 21, 2014 Author Share Posted October 21, 2014 Tried self diagnosis on the car and found error code E199 which seems to relate to a faulty sensor unit, is this expensive/ time consuming to fix? Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted October 21, 2014 Share Posted October 21, 2014 That code needs to be translated anyway as they aren't true error codes. Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted October 21, 2014 Share Posted October 21, 2014 I think your looking at needing to clean the temperature sensors, I would personally clean the maf sensor, thermostat connector at least Quote Link to comment Share on other sites More sharing options...
mat d Posted October 21, 2014 Author Share Posted October 21, 2014 The engine is running fine apart from the fan noise, would it still be okay for her to drive it for a few days? Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted October 21, 2014 Share Posted October 21, 2014 Keep it to minimum required journeys only. If it's a blown valve or piston (unlikely but the point is) you don't know it, what it is, or how badly you can damage the car, it could be nothing but it could be a big problem. Quote Link to comment Share on other sites More sharing options...
AdeMk1 Posted October 21, 2014 Share Posted October 21, 2014 Code E199 means 'Erratic Temperature Readings' which will either be due to a faulty temperature switch or a dodgy connector/wiring problems. Explains why the fans are on constantly as the ECU puts them on as a failsafe. Try removing the sensor plug, spray with WD40 or switch cleaner and reattach the plug. Always try the cheapest fix first! Quote Link to comment Share on other sites More sharing options...
btmaldon Posted October 21, 2014 Share Posted October 21, 2014 Car is normally ok to drive with the light on but if it starts flashing you should stop the car asap. Quote Link to comment Share on other sites More sharing options...
mat d Posted October 24, 2014 Author Share Posted October 24, 2014 Thanks for all the tips and advice guys, turns out it was a loose wire coming from the sensor, bit of solder and it's sorted. Quote Link to comment Share on other sites More sharing options...
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