Bf2 Engine Light

[Slash737]

Ok. My bad. After consulting the owners manual (FG XR6T) this is what is listed.

Malfunction Indicator Lamp ( MIL )

The MIL will illuminate for 3 seconds after turning the ignition on. If the MIL does not illuminate have the system checked by an Authorised Ford Dealer as soon as possible. If the MIL is constantly illuminated when driving:-

This indicates the vehicle is no longer operating within the emission regulations and the vehicle should be taken to the nearest Authorised Ford Dealer for inspection or repair.

If the MIL flashes at a rate of approximately one flash per second when driving:-

This indicates a fault has developed that will damage the catalytic convertor. Continued use when the MIL is flashing will cause damage to the emissions system. Note that there is no message centre warning for MIL. Contact your local Authorised Ford Dealer for advice.

Not sure if it's the same for a BF, but it wouldn't be far off.

that's exactly word for word in my BF2 owners manual.

[Slash737]

The verdict from ford is the O2 sensor after the cat is faulty, and of course they dont have any new ones in stock so I have to go back later today.

They tested this with an O2 sensor from another car apparently.

[Slash737]

well it turns out replacing the o2 sensor didnt fix it. the code still comes up but not straight away. they tell me they can see that both o2 sensors are working through their computer so they arnt sure whats causing the fualt code to come up. they tried resetting and reloading the software but same outcome.

cars is goin back tomorrow.

[Erko]

let us know how you get on. I have this issue from time to time. seems there are more causes than just o2 sensor.

[Slash737]

before I took the car back to ford this morning, I thought ill check the fuses, theres one labled HEGO which is the o2 sensor and guess what, it was blown.

turn up to ford and tell them this but they still wanted to keep the car so they can test it out.

my suspicion is, when I did the manifold bolts the wiring for the sensor mustve been touching the heat shield and melted the wires. yesterday I seen the mechanic take the heat sheild off so he mustve seen this and changed the sensor.

[Broaders77]

I've been having exactly the same issue with my BF. The emission light came on, Ford reset the sensors. Couple of weeks later it's back. Took to another mechanic who reset it then replaced the O2 sensor (at great cost, see my whinge in another thread) but now it's back on again.

I'll be checking that fuse when I get home tonight.

Can you let us know if that turned out to be the problem?

Also, I'm being told that this is causing the car to overcompensate and run rich, hence some rough idle and power reduction issues I'm having. Did you have the same?

[Slash737]

yeah once the fuse was changed all is fixed and back to normal.

for me, the car idled an ran perfectly fine when the light was on.

[20pounds]

I had the same prob.

for me it was the wiring going to the first o2 sensor was melted but took ford over a month and about 5 visits to fix even after I showed them what it was the first time round

[Broaders77]

I swapped the fuse out last night but no result. It's a wierd one as the car only idles rough when the air-con is on but feels down on power most of the time.

[Broaders77]

Right, finally got it fixed (I hope!). They found 2 loose bolts on the exhaust manifold which means air was getting in, making the system run lean.