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Message: <blockquote data-quote="Petrus" data-source="post: 27881" data-attributes="member: 22206"><p>Hi all and Happy New Year,Have any of you experienced the fault code as above before?My car usually shakes for a few secs (arnd 10-15secs) every morning during cold start. and recently, my check engine light turned on. I scanned the car and found the error code above. It says misfiring in cylinder 5 with code above. I have changed ignition coil and spark plugs not too long ago.At the same time, the scanner indicates that my 02 sensor might due for replacement soon. I looked for info on this Fuel Composition Sensor for our UDM but I can't seem to find anything detail on it. All i got was the fact that this fuel consumption sensor controls the flexi-fuel system in our car. So my questions are:-1) Is the error code associated to my O2 sensor needing to be replaced?2) Where is this "Fuel Composition SENSOR" located in our car?For now I have cleared the error code and nothing seems to be wrong. But since I am changing the O2 sensor soon, if there is this Fuel Composition Sensor, i might want to check / change it.Hope to get some feedbacks from the sifus here. Really appreciate any form of feedback.Thanx <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>