V8 engine shuts off after 4 minutes, code P0627-00 (6C) Fuel pump A control circuit/open

[gsxr]

USA-spec 2010 LR4 with 5.0L V8 engine, 160kmi. No prior issues with fuel system.

Truck died about 4 miles from our house after a cold start, about 4 minutes driving time. Would not restart, just cranked at normal speed, coughed and sputtered, but would not stay running. Towed home and now I'm trying to troubleshoot / diagnose with GAP IID tool.

Code reported is: P0627-00 (6C) Fuel pump A control circuit/open

After sitting overnight (might only need 4-8 hours of sitting?) the engine will start normally, but after 3.5-4.5 minutes the engine just shuts off, and will not restart. Each time, the ONLY fault code stored is P0627-00. Clear the code, it returns after the next time the engine is started & dies ~4 mins later. Tried swapping the fuel pump relay, there was no change.

Studying the factory manual (section 310-01D) it looks like the Fuel Pump Driver Module (FPDM) is a fancy relay/controller for the pump, but it doesn't appear the FPDM is a common failure. The internets have almost zero information about code P0627 related to JLR engines. Guess I'm just lucky to have the oddball code. And for the handful of internet mentions for this code, there are almost no follow-up posts with the root cause & details about what components needed to be replaced / repaired to fix it!

The fuel pump assembly, or possibly the fuel tank flange which appears to have a "pass through" electrical connector, seem like the likely culprits. I hate to drop the fuel tank if this isn't the problem. And I'll be even crankier if I replace the pump/flange/etc and that doesn't fix the problem.

Related question, the OE/dealer pump part # LR043385 is $450-$475 from online discount dealerships. The Conti/VDO pump for $275-$300 is allegedly OEM and made in Czech Republic - does anyone have experience with the VDO pump? I know enough to avoid ÜRO pumps like the plague, I don't want to repeat the job in six months, lol.

Just had our first snow here in Billings, and of course the LR4 is our only 4WD/AWD vehicle, so I'd like to get this running again soon-ish. Especially since there are brand-new Blizzaks ready to bolt on when it runs again. Oh, bonus info, the nearest Land Rover dealership is a 10 hour drive away... not an option to bring the truck to the dealer, and I don't trust any local indy shop to do anything I can't do (although it might take me 4x longer, lol).

Anyone BT, DT or have relevant information to share? @Rover Range - have you ever seen this particular code?

Thanks in advance for any advice!

 

[itsaguything]

According to the manual…

 

[gsxr]

Thanks, @itsaguything! That is helpful. The V8 manual had NO explanation for this code. Interesting that the info was "added" to the SCV6 manual. Looks like at a minimum I need to drop the tank and inspect the wiring connectors at the pump flange.

 

[scapistron]

This sounds like a situation where you're going to need to drop the tank just to inspect the wiring. And we'll if the tank is out ...

 

[MellonRover]

Last week I had to get a tow after my alternator was overcharging and voltage spiked something and shut me down while driving downhill. It was code for secondary fuel pump voltage too high. p0232-24 fuel pump A secondary circuit high. General signal failure signal stays high.
It would start, and immediately die. After roll back showed up (20 min) it started and ran normally.
Might sound fruitless, but check your charging system too. Replaced with new JLR alternator and all is good.
Also, the cigarette lighter was dead when it was not starting. Came back on after the 20 min wait for tow.

 

[Rover Range]

I would lean towards the fuel pump driver module.
It is located inside the vehicle, behind the 2nd row seats. C2369

 

[gsxr]

I managed to remove the trim panel to access the FPDM as shown in the diagram above. Of course this is located behind the rear AC unit which must be unbolted and gently pulled forward to allow access - VERY limited access! - to the FPDM. What a miserable job, and lousy place to mount this module.

I have a replacement FPDM on the way but it may not arrive until after the weekend. I'll update again when I get the replacement and swap it in. Fingers & toes crossed...

 

[gsxr]

@MellonRover - I connected a voltmeter when starting, voltage went up to 14.8v and seemed normal. When the engine died, I wasn't watching the voltage to see if there was a spike just before shutdown, but there were no other codes besides the usual P0627.

@Rover Range - the replacement FPDM made no difference. At a cold start, it ran just under 4 minutes and then died, same as before.

I assume now I need to drop the tank and see what's going on, but also guessing that while it's apart I should probably replace the pump (new VDO?), along with the other parts listed in the service bulletin (tank flange, new style filter+bracket, O-ring, hose clip). Are there any other parts I should order at the same time, besides what's listed below?


LR112785 - Fuel tank flange assembly
LR175172 - Fuel filter
LR113338 - Bracket for fuel filter
LR117476 - Fuel tank flange O-ring
CN100509 - Hose clip

Anything I've missed for troubleshooting?

 

[Rover Range]

Have you had the fuel tank flange recall done?
Those are the correct part #s for the recall.

There is a low fuel pressure sensor , on the right side of the transmission-follow fuel lines- that can cause all sort of fuel pressure issues. Maybe try that next.

 

[gsxr]

Have you had the fuel tank flange recall done?
Those are the correct part #s for the recall.

Nope, the recall is not done yet. I moved 10 hours away from the dealer in early 2022, just before the parts became available. I figure if I have to drop the tank and open it up for inspection, I might as well do the tank flange upgrade myself.

There is a low fuel pressure sensor, on the right side of the transmission-follow fuel lines- that can cause all sort of fuel pressure issues. Maybe try that next.

I'll dig up the part number for that sensor next. Is there any live data available from this sensor, viewable on GAP-IID? Also, would there be a different fault code if it was the low pressure sensor?

I have to wait a week for each part order, if I try the sensor next, it will like arrive next Monday/Tuesday if I order tonight. Fun stuff.




EDIT: Found the pressure sensor info in MicroCat, for 2010-2013 V8/AJ133 models:


LR015356 = Low pressure sensor. $138 dealer list, ~$120 dealer discount, ~$35 for aftermarket "OEM". The aftermarket sensor doesn't include the metal tube/adapter which does come with the OE/Genuine dealer part.

LR108241 = High pressure sensor at the rail. $143 dealer list, ~$125 dealer discount. Aftermarket Bosch had been around $50 but is OOS everywhere, possibly NLA.