2.4 Puma 130 Turbo Overboost fault

[Chenz]

Went up to the farm last week in my 130 2.4 Puma. I fueled up and crossed the Blue Mountains on the way to Lithgow, came up to a truck on one of the many overtaking lanes and pulled out, put the foot down in 5th and went to overtake and there was nothing there. It was not in limp mode, temp was OK but it felt like there was no turbo.

I dropped back and pulled over, lift the hood and check to see if an intercooler hose had fallen off or failed - all good there. No other problems could be seen so I battled on the last 40 klms taking it easy and making sure I was not holding up traffic and the many semis that use the Great Western Highway. Some hills back to third doing 40 klms.

Got there and turned off the motor and unpacked. 1/2 hour later, start her up and drive up the hill no problem, full power again. No problems since. Checked with my Nanocom when I got home and my mechanic put his whiz bang diagnostic unit on it and it came up with a fault code that said turbo overboost.

He is not sure what caused this and it has been fine since.

Anyone else had this problem and/or can shed some light onto it's cause.

Thanks

[ozy013]

There was a Landrover service bulletin ages ago in regards to loss of power. It was engine vibrations damaging the wiring to the turbo.

Found it!

TECHNICAL SERVICE BULLETIN No.LTB00254/2010
20 January 2010
Circulate to: Service Manager Parts Manager Warranty Administrator Service Reception Technicians

© Land Rover
All rights reserved.
Subject/Concern: Turbo Modulator Service Link Kit
Model:
Defender (LD) VIN Range: LD732615-LD779287
Markets: All except NAS
Section: 418-00
Summary
A customer might express concern of a loss of power with the Malfunction Indicator Lamp (MIL) illuminated.
Cause: Engine vibrations fracture the wiring to the turbo modulator. Suggested Customer Concern Code A88.
Action: Should a customer express concern, follow the Service Instruction outlined below.
Parts Required
Description Part Number Quantity
Harness Link Kit LR020663 1
Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken as guidance only. Always refer to DDW to obtain the latest repair time.
Labor Time
Operation Description Operation No. Time
Fit Ferrite Fuse To Engine Harness 86.71.89.26 0.4 hours
Repair/Claim Coding
Causal Part: LR007352
ACES Condition Code: 30

Also it might pay to check the MAP sensor. You said it wasn't in limp mode, so I guess the MIL wasn't lit up. Is the EGR valve still doing it's thing, or has it been deleted and blanked? That could be another possibility. Was the fault code
P0234-00?

I'm not at home at the moment, just loading at the wharf and having arvo smoko, using the work Iphone, but I'm pretty sure that there was a thread on one of the UK forums is regards to the overboost fault. I would put my money on the MAP sensor.

[POD]

Interesting to see that service bulletin. I had the same problem a few years ago on the very last day of a 9-week outback trip, same fault code, I traced the problem to a broken wire at the turbo actuator. The original installation had the outer wire stretched taut and it had broken internally right near the plug. I cobbled it together at the time but a new plug was unobtainable without buying a whole new loom. When it failed again about 12 months ago, I got a plug from a Transit Van wrecker with a 12" tail of wires on it and grafted it in with some slack.

[Chenz]

Thanks guys. I haven't touched the EGR valve and I had a look at the various wiring looms running to and round the turbo and all seem to be OK, not overly taught of broken. No warning lights came on it just had a loss of power like the turbo was not working.

Going for a big drive down the coast tomorrow so will keep an eye on it and hope it goes OK.

[n plus one]

Sounds like your SCV is on its way out - you basically loose all power.

[ScottL]

Went up to the farm last week in my 130 2.4 Puma. I fueled up and crossed the Blue Mountains on the way to Lithgow, came up to a truck on one of the many overtaking lanes and pulled out, put the foot down in 5th and went to overtake and there was nothing there. It was not in limp mode, temp was OK but it felt like there was no turbo.

I dropped back and pulled over, lift the hood and check to see if an intercooler hose had fallen off or failed - all good there. No other problems could be seen so I battled on the last 40 klms taking it easy and making sure I was not holding up traffic and the many semis that use the Great Western Highway. Some hills back to third doing 40 klms.

Got there and turned off the motor and unpacked. 1/2 hour later, start her up and drive up the hill no problem, full power again. No problems since. Checked with my Nanocom when I got home and my mechanic put his whiz bang diagnostic unit on it and it came up with a fault code that said turbo overboost.

He is not sure what caused this and it has been fine since.

Anyone else had this problem and/or can shed some light onto it's cause.

Thanks

Hi Chenz, did you ever get to the bottom of this problem? The exact same thing (right down to fueling up prior to problem) at the the weekend. Brought it to indie service garage and showing turbo boost sensor dirty? Cleaned and only done a few kms since but seems ok. Bit of a roadtrip ahead next weekend so a bit nervous of it happening again.

[Chenz]

Never happened again. I have my Nanocom unit hooked up permanently now and have never seen this fault again. Welcome to the great world of Land Rover.

If you are going on a long trip a Nanocom is a good investment. If you can't get rid of fault coded and you in the middle of Woop-Woop then you are in trouble. If you can identify the issue and cancel the code you can get back up and going and get to help.

Good luck. Hope you have fun