I jacked up my 2001 V6 S-type and gave the engine bay/underbody a Karcher clean after spraying with de-greaser. Lovely and clean but now engine cranks with no start and after connecting iCarsoft I am getting U1262 (J1850) comm error. Any advice on what to do??? Steve form downunder.

 

good luck, Steve from downunder

 

these have a starter interrupt if it cranks it over it has comms with the cluster

did you flood your crank sensor?

 

Jaguar had some advise a few decades ago.

 

As the TB point out, water pressure cleaner can penetrate thru seals. I am also one, who uses the pressure cleaner frequently, but on Jags I am quite careful with it.
With the car jacked up, you should have a thorough look of where you exactly pointed the pressurized water at and look if you can spot "elements" (connectors, modules, relays, fuse boxes) which you may have hit with that water-beam. Then I would open those "elements" and chase the water out (with air-compressor-gun first (carefully), and then I would apply WD40 where appropriate. I assume you know that it would also be possible to shoot water into the passenger compartment (where an important module is), if you direct the water-beam from the top onto the wrong spot in the engine compartment....
Or did you simply disconnect a connector with the power of the water-beam?

 

I’m thinking you disconnected a valuable and important sensor wire. Look to see if you blew the connectors off and reconnect them. Oil pressure switch maybe?

 

Or perhaps the wire to the crank position sensor... ?

 

It could be a lot of things, which is why I suggested to have a very good look. Have a look, which part could have been soaked inside thru it's seals and also check, what is not where it is supposed to be - maybe you shot something off it's designated position - even something like a vacuum hose...

The TB suggests using a low power setting on the pressure cleaner - I am not aware of something like that, but the front of the nozzle can be adjusted: Wide spread out fan = lower pressure. After I will have replaced my cam-cover gaskets (my next job), I will do that on my X-Type carefully to clean off the grease under that car (I just bought the X like that). But next I will do the actual cleaning by hand: I use ATF (automatic transmission fluid) to clean up everything nicely under the car - I use that, because I have little other use for it: I bought a lot of multi vehicle ATF, only to find out that their suitability promises are worthless lies. I then bought the correct ATFs for S-Type, X-Type, and XJ8 (X308) - ....which are all different.

Also: I heard on the news that you currently have some really nasty weather in WA. Maybe just wait for the sun to come out again and let the S sit and bake in the sun (without slip, slop, slap... with the bonnet open...

 

Thanks xalty, that makes sense, I could easily have "washed" the crank sensor so I will investigate. Is it hard to get to?

 

Hi motorcarman, wish I had seen that 4 days ago. LOL. I am investigating all sensors. Done the easy ones (MAF,APP,Air TemMPC was bone dry,)

 

Thanks Peter, I was reasonably careful with my directions of jetting and all sensor fittings I can reach easy I have disconnected Sprayed with MAF cleaner and dried with compressed air and re-fitted. Will carry on till we win. cheers

 

Thanks S-T O,
Am now investigating all sensors and dry-cleaning them. At least my ***** is spotless now. LOL.

 

Hi Peter, yes, nasty weather is not assisting me and I have no need to SLIP-SLOP-SLAP.LOL. I have lots of spare ATF too,, good idea to use that instead of Mr Karcher.
Cheers from wet n windy FREO.

 

Thanks Aarcuda, now investigating all connectors. Cheers for reply.

 

Thanks for the good wishes Rober2, I will need them by the sound of things. Geelong are about as handy as FREO at the mo hey???

 

It's gone quite on "this channel"... Is your cat purrring again?
I just remembered that I had not too long ago also an issue restarting the engine after cleaning it with a pressure cleaner:
It was on the X-type, I swapped the water pump and I removed the mess caused by the leak before. But I also did bigger repairs long before and when engine did initially start, when I finished the water-pump job, but then did not anymore when we wanted to drive it, I noticed that back then I actually forgot to tighten those really big clamp-rings around the big rubber hose leading to the air-intake. So what I think what happened is that a little bit of water got in there. Which would mean, the the fuel mixture would also have contained water. So I removed that big hose, removed the humidity (wiping it off and I think also using a heat gun), and with some difficulty was finally able to start the engine again. I drove the short distance to town, but it was still not totally alright. So I figured that I have to heat up the engine significantly, thus I drove to the highway and drove the few k's (miles) there That solved the issue...

 

Hello Peter, thanks for the message, sorry to hear you had some pain with your "X". I finally resolved my issues. I will be posting a help/hint soon for those who have issues with DVVC or A/C compressor or Alternator. I am a full bottle on them now LOL. My cat is thankfully purring once again.Take care over there in "CATS TERRITORY" ( they got it in gear last week) lets hope they can crucify the Eagles tomorrow. All the best mate, Steve.