1 reply to this topic

[MattBlacKY]

Hi there,

My girlfriend bought a 1.4 duratec 2003 fiesta (mk6?) a few weeks ago, I drove it to screwfix last weekend and noticed it was running bad. I plugged my laptop into the OBD port and found P0103 (MAF sensor high input) and P0300 (random misfire). So I started searching for the maf sensor to give it and clean and test it. The problem is I cannot find the thing. I have got a new replacement form eurocarparts encase it is knackered. I even bought a Haynes book to help me find the damb thing. There is no mention of a maf sensor on the petrol models in the book, yet you can buy them from the parts supplier and the car has DTC codes showing there is a fault with it.

On my focus it is in the intake after the filter housing, you can't miss it with the great big electrical connector hanging out of the top. But on the fiesta there is no sign. So I thought maybe it doesn't have one, but that doesn't explain why parts shops sell one for it or why it has a mass air flow high voltage input error code. There is a map sensor in the throttle body, but that would throw up a P0108 code. I'm really confused.

I have pulled the airbox off, the feed pipe to the throttle body and still cant see it or the wiring plug for it. Can anyone help point me in the right direction? Any help would be much appreciated.

[MattBlacKY]

Right I've managed to fix it so I'm replying encase anyone has a similar issue. The MAF sensor is in fact a the TMAP of the fiesta, not the MAF as sold by Euro car parts. The tmap definitely helped but there was still an issue that I needed to finalize. I changed the coil but it still wasn't any good so I robbed the HT leads off my focus. Problem solved and it ran better than it ever had done. So in summary I strongly suspect there were two issues running side by side. So in all it has had a new tmap £50, Coil £32, Spark plugs £8, air filter £6 and some HT leads £17. A real pain in the rear but I got there in the end. The missus is well chuffed now and I have only got to throw an oil filter on and it has had its service for the next year.