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Discussion Starter · #1 ·
Hello

I am a New poster with my third jag

It is a 2014 3.0 diesel XF sport saloon.

Problem - stalls when moved from Park. I have searched on here and other forums.

Work done - lots on internet research including searching this forum
Codes read with generic reader.
Fuel filter replaced and EGR cleaned as research suggested these as possible "easy" fixes.

Gear box code - p1707-72 "transfer case neutral or Park/neutral indication circuit - actuator stuck open" this led to removing Transmission control module/ valve body (TCM). Testing solenoids for resistance indicated park one was high so all replaced. Problem remained.

ECU - Code U0167 - lost communication with immobilizer also read.

Second hand TCM purchased from established ebay seller with 100% + feedback - fitted. Problem remains. I swapped over the electronics from the old TCM as I knew it would otherwise need coding. I do not have SDS.

Also checked electricals including battery voltage.

Current codes are P2784-02 "input/turbine speed sensor A/B correlation" - this did not appear until TCM changed.
ECU codes U0167 still...and P0700 Transmission control system malfunction and U0402-54 invalid data TCM. I guess these are related to P2874-02.

Any suggestions please? I fear I am looking at a gear box change. Has anyone done this themselves? Where is the immobilzier on these? It starts fine so I struggle to see that being the problem.

Thanks very much
 

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Eek! Beyond my experience I'm afraid. Gearbox issues are so few there's not much posted to assist I fear. I think you'll need a gearbox specialist. The Jaguar diagnostic is SDD, SDS is a type of heavy duty drill, though that may be appropriate!
 

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Hi, the only real way to tell is to get the cades read using an SDD reader, I know of a very good and knowlegable Jag Independant in Liverpool who would probably be able to sort you out. Phil
 

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SDS is actually the attachment mechanism not the drills or bits themselves.
 

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Yes, yes, I know! Bit like saying I'm going to do the hoovering with a vacuum not made by Hoover.... 🤣 Chris - threads tend to go off topic around here!
 

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Yes, yes, I know! Bit like saying I'm going to do the hoovering with a vacuum not made by Hoover.... 🤣 Chris - threads tend to go off topic around here!
One of my biggest pet hates that one!!..

Much like 'Kango'... :D
 

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Just looking it up now Dave...
 

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Just had that 1707 today when changing gearbox oil. Run engine at 2000 rpm for a few seconds that should fix it. Re check level after going through gears make sure gearbox is above 40 degrees . You must have had the sump off to do the stuff you said. Then re set codes. Worth a try.
 

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Discussion Starter · #11 ·
Thanks for replies. Just to clarify.. I have put a few bits in bold from opening post below. 1707 is no longer showing. I cannot drive the car anywhere sadly.

"Current codes are P2784-02 "input/turbine speed sensor A/B correlation" - this did not appear until TCM/valve body changed.
ECU codes U0167 still showing ...and P0700 Transmission control system malfunction and U0402-54 invalid data TCM. I guess these are related to P2874-02.

Any suggestions please? I fear I am looking at a gear box change. Has anyone done this themselves? Where is the immobilzier on these? It starts fine so I struggle to see that being the problem.

Thanks
 

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It would appear that the commonest cause of the P2784 is wiring problems. I would go over any connections you have removed or wires you may have moved. I would then put back the old valve body to try to get back to where you started.i.e to get rid of the 2784 if possible. I know it would be a pain but you could carefully save the oil. I presume you used new oil, as the original problem may have been bad oil. Just out of interest one cause of 2784 is bad oil.
 

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Discussion Starter · #13 ·
Thanks, yes new oil used. Quite possible that I have damaged the wiring at some stage as it (valve body) has been in and out a few times. I have reused the wiring/ electronics stuff from the valve body that I removed to avoid need for coding.
 

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A friend of mine had problems with a Citroen C6 automatic stalling when stationary in D and it was caused by a fault torque converter.

If you very gently apply the brake so that it’s just enough to trigger the interlock to get it out of park and let go of the brake pedal as soon as it moves from P, does it still stall when stopping in R or D?
 
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Thanks for replies. Just to clarify.. I have put a few bits in bold from opening post below. 1707 is no longer showing. I cannot drive the car anywhere sadly.

"Current codes are P2784-02 "input/turbine speed sensor A/B correlation" - this did not appear until TCM/valve body changed.
ECU codes U0167 still showing ...and P0700 Transmission control system malfunction and U0402-54 invalid data TCM. I guess these are related to P2874-02.

Any suggestions please? I fear I am looking at a gear box change. Has anyone done this themselves? Where is the immobilzier on these? It starts fine so I struggle to see that being the problem.

Thanks
This is what WM says:
Font Rectangle Number Monochrome photography Parallel

The heading for the third column from left is “possible cause”.

other codes are more generic. Suffixes make big difference.SDD is needed if you wanted more details.

are you sure the connector is sat properly?
 

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Discussion Starter · #18 ·
A friend of mine had problems with a Citroen C6 automatic stalling when stationary in D and it was caused by a fault torque converter.

If you very gently apply the brake so that it’s just enough to trigger the interlock to get it out of park and let go of the brake pedal as soon as it moves from P, does it still stall when stopping in R or D?
Thanks - will try that soon. Suspecting that the convertor will be the issue.
 
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