I have had a problem with a micro switch on the door lock ..fell apart due to brittle plastic so I epoxy in place and used a couple of cable ties ..thin ones and its all good ( prevented window dropping and wife upset)

 

any photos of your fix ?

Z

 

Sorry no its inside the passenger door but it was the switch in the long plastic white retaining clip on the outside so easy to see if its detached..moves when you pull on the door latch or not if its broken

 

When you disconnect the battery, the first time you start the engine WILL REV to 2000 RPM!!!!!!!!!!!!! (normal)

Sometimes you can get the engine to stop this behavior by turning the key to ON/ENGINE OFF, then depress the throttle pedal several times, turn the key OFF.

Start the engine and see if it helps?

 

Yea I understand that if you have had the battery disconnected you should put ign ON an then slowly move throttle trough the full travel a couple of time to re set it all ..

Good point Motor man

 

Checked the rpm on start up yesterday 1100 rpm drops to 860 when warm

 

I have a 2014 3.0 XF and it just started doing the same thing. With a cold start (Usually when it is colder than -25C it over revs to the governed limit, warmer and it tops off at 2800 rpm for a minute or so then drops down to normal idle), The car throws 2 codes, P2189 and P2187. It has been to the dealership a few times and apparently there has been some sort of TSB for the O2 sensors so I'm just waiting for them to come in and they will swap without charge.

I have had the same issue with the 2010 XF 5.0 to a lesser degree when the MAF sensors required cleaning and the COV sticking open for a bit,

Hope you had it fixed by now but if your still scratching your head, here was my two cents.

Kevin

 

If temps as low as -25 deg C were common I would be fitting a sump/radiator heater. Was it ever designed to run at such a low temperature?

 

For the Canadian prairies, -25 deg C is very common for at least a quarter of the year. Our temperatures range from +35 to - 43 deg C with changes in excess of 30 deg in a day at times.

We are starting to see more vehicles coming to Canada without winter packages which is strange, these cars are ordered with the winter packages which include the heated windscreen, electric pre-heat, heated seats and steering and the block heater and normally these vehicles are great in winter with the AWD and the heavy weight. The only addition I add is the electric battery blanket to keep the battery warm as a frozen battery is not a good thing. Finding a place to plug in is the real issue when your away from home.

The high revs is not normal even in our conditions.

 

out here on the Oklahoma plains our temp extremes are nearly as bad in the winter,
with -22 C (-8 F) not uncommon. Although it doesn’t last for months, just days or a week or two. AFAIK, no cars for our market are
fitted with any special winterizing features.

Summers are the worse here. Always have a few weeks of 41 C to 45 C (106 F to 113 F)

Plants and livestock suffer the most. Vehicles and people next in line

Z

 

Last summer in the UK we had a couple of days of 40C weather. We aren't used to it so it was pretty bad, I hope it doesn't get that hot again this year.

 

It's difficult to see how the O2 sensors can be affecting the RPM on a cold start - the engine is in open loop at that point and the O2 sensors aren't doing anything. Unless there is some stored value such as long term fuel trim which is wrong due to the sensors and that affects the cold idle? Let us know if new sensors fixes it (and if your MPG improves).

 

Would help to know the TSB reference & details.