Hi, I have an mk4 ford fiesta 1.25 zetec and have had it plugged into my OBD scanner and it says i have an Open loop fuel fault and that its not going into the closed loop so the fuel mixture is rich and so its burning more fuel. Im getting no trouble codes up just on the fuel system says I have that fault and that the oxygen sensor and oxygen sensor heater is not working! but again no proper codes.
I have replaced the front oxygen/lambda sensor naturally as thats what it is all pointing to, but still no luck. Any ideas what else it could be? maybe a wiring fault somewhere? Anyone had a similar problem? Thanks
I have replaced the front oxygen/lambda sensor naturally as thats what it is all pointing to, but still no luck. Any ideas what else it could be? maybe a wiring fault somewhere? Anyone had a similar problem? Thanks