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Cupboard

Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

2011 Defender 110 Puma 2.4 HT Corris Grey

0234 Turbo Overboost

After I've been driving an hour or so, seemingly when I'm going downhill my car goes in to limp and the ultrgauge (usually) comes up with error 0234 which my IIDTool says is Turbo Overboost.

Any idea what I should be looking at?

Other symptoms are that is sometimes sounds a bit rough/rattly under partial throttle although some days is really quiet, and there's a dead spot around 2300 rpm when you're accelerating.

EGR is disabled.

VCV?

29th Apr 2016 1:39pm

pdv

Member Since: 07 Feb 2014
Location: Asse
Posts: 26

2008 Defender 90 Puma 2.4 CSW Bonatti Grey

Hy got same problem anybody an idea

Cheers

24th Aug 2016 8:27pm

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

Maybe a stiffy linkage/motor adjustment of turbo-guide vanes?

6th Sep 2016 10:32am

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20347

Turbo linkage would be worth checking.

6th Sep 2016 11:23am

Helstoon

Member Since: 08 Mar 2012
Location: West Cornwall
Posts: 32

Hello,
Just had the same problem with my new to me 2008 90,when accelerating uphill the revs dropped and speed was limited to 30mph. The garage did tell me when I bought it that it was a potential issue that may improve with use ( it had been dried stored for 3 years prior to refurbishment ), it didn't, so they had it back and replaced the turbo with a new one, the power is now where it should be.
Hope this helps
Paul

6th Sep 2016 7:24pm

bell-auto-services

Member Since: 08 Jul 2007
Location: North Yorkshire
Posts: 2232

2013 Defender 110 Puma 2.2 USW Orkney Grey

TECHNICAL BULLETIN
LTB00393
29 JUN 2011

.
SECTION: 303-04B
Turbocharger Actuator Arm - Lower Level Repair
AFFECTED VEHICLE RANGE:
Defender (LD) - 2.4L Puma Diesel Only

Model Year:

2007 Onwards
VIN:

7A732615 Onwards
MARKETS:
All Except NAS
CONDITION SUMMARY:
Situation: A customer may report a concern of restricted engine performance and or a Check Engine Lamp displayed in the Instrument Pack. Following diagnosis trouble codes (DTCs) P0234 or P0299 may be stored in the Powertrain Control Module. If the turbocharger actuator arm movement appears to be restricted due to corrosion of the actuator rod and pins a repair kit is now available.
Cause: Turbo actuator arm corrosion may cause restricted movement of actuator arm travel. Suggested Customer Concern Code - D42.
Action: Should a customer express concern, follow the Service Instruction outlined below.
PARTS:
LR019905

Actuator arm

1
LR029042

Grease

1
WARRANTY:
noteNOTE: 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 TOPIx to obtain the latest repair time.
noteNOTE: DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
DESCRIPTION

SRO

TIME

CONDITION CODE

CAUSAL PART
Install a new Turbocharger Actuator Arm

19.42.79

0.6 hours

69

LR018396
Read and clear DTCs

12.90.16

0.2 hours
noteNOTE: Normal Warranty procedures apply.
SERVICE INSTRUCTION:

1. Read and clear DTCs.

2. Install a new Turbocharger Actuator Arm (see TOPIx Workshop Manual, Defender 2.4 Puma - 303-04B).

Last edited by bell-auto-services on 6th Sep 2016 7:36pm. Edited 1 time in total

6th Sep 2016 7:33pm

bell-auto-services

Member Since: 08 Jul 2007
Location: North Yorkshire
Posts: 2232

P0234-00 Turbocharger/supercharger A overboost condition - No sub type information

NOTE: The temperature and manifold absolute pressure sensor (TMAP) has registered an over-boost pressure condition

Fault affecting intake or boost air circuits
Temperature and manifold absolute pressure sensor circuit fault
Temperature and manifold absolute pressure sensor component internal failure
Actuator-vane variable geometry turbocharger actuator arm mechanical fault
Actuator-vane variable geometry turbocharger internal failure

Check the intake air path and boost air path for faults including leaks, blockages, and control valve actuator malfunctions
Check for engine control module related diagnostic trouble codes
Check for actuator-vane variable geometry turbocharger actuator arm for ease of movement
For additional information, refer to: Turbocharger Actuator Rod (303-04B Fuel Charging and Controls - Turbocharger - ID4 2.4L Diesel, Removal and Installation).
Check for actuator-vane variable geometry turbocharger related diagnostic trouble codes

6th Sep 2016 7:34pm

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