Apologies if this was answered before somewhere. I am trying to access and unplug the boost sensor at the rear of the engine, but can't get my hand into the space to unplug it. Seems that the rear engine compartment cover may need to be removed first? Anyone have a handy trick or wisdom for accessing this area? Does the plug only press on the upper side, or do you need fingers on both sides? (2016 XF)
Thx in advance!



I can touch it with my finger tip, but that's all.

 

That's a curious request... mind saying why you want to do that?

 

I am experimenting with a tuning box and need to intercept the signal.

 

That sensor is an absolute mare to get to and even with the chargecooler removed it's really tight to get at it when removing the supercharger/inlet manifolds.

I'd be considering hitting up the wiring at the ECU end instead - wiring diagram attached. The sensor you're wanting to get at is the TMAP sensor on this diagram, C1E117 is the larger ECU connector, and e.g. C1E117/23 is pin 23 of that connector.

Edit: I should say this wiring diagram is for my 2010, but you may find the same wiring loom colors/pins etc in which case it's probably the same.

 

Oh... I would not do it!

It's used to avoid engine damage...

Get a proper tune, don't use a box, and first of all reduce the charged air temperature.

 

Thanks for the ideas. After a few hours of scraping knuckles and sleeping on it I decided that I was lacking the appropriate "technology" and went off to the tool supply shop to find a solution. The plug is a real bear to get out, and more so to plug back in as it sits at an angle. Mostly done by feel.

The hose pliers allowed me to gently unhook and remove the plug, and the 90° pliers was most useful in orienting the plug putting it back in. There wasn't very much room for the mirror, but it was useful for getting the right orientation prior to feeling it in. The compound pliers I bought first because of the their length, but didn't use it until it came to digging out all the other pliers I dropped ;>)

$50, some skin and two evenings and I am done - Thanks for the replies - LM


Brain surgery by an idiot paying $10.00/hr for the privilege.

 

FYI - for those working with a Racechip or need similar access to the TMAP sensor (it is a bear), here's a $19.95 extension I found that make makes the second time around a little easier.

 

Great find!! I will definitely be fitting this when I next remove the supercharger - I was planning on extending the loom, but for $20 it's literally not worth it.