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astroarcadia

Member Since: 12 Jun 2020
Location: Gloucestershire
Posts: 49

Help please with fault codes and diagnosis.

I have a 2007 2.4 with the MIL on. All stock, no reap or EGR delete.

I have black smoke on start up and and when under pressure. The vehicle is in limp mode with little or no turbo. I get a chugging when I start up and get going.

Fault codes shown are:

P0100 - Mass Airflow Circuit Problem.
P0234 - Intake boost pressure sensor input signals intake pressure above the maximum specified pressure by 4 psi for more than 5 seconds
P1103 - The voltage signal from the Mass Air Flow (MAF) sensor is higher than normal.

I have changed air filter, fuel filter and the MAF for genuine and also the VCV.

I have also remove the EGR and cleaned and refitted.

Any ideas on what is causing all this?

I have checked hoses for leaks also.

21st Jul 2021 1:08pm

Bluest

Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3997

2007 Defender 110 Puma 2.4 XS CSW Java Black

Is the turbo actuator free moving? 2007 110 TDCi Station Wagon XS

21st Jul 2021 1:36pm

astroarcadia

Member Since: 12 Jun 2020
Location: Gloucestershire
Posts: 49

Please forgive me, how can I check this?

21st Jul 2021 1:58pm

Pacha

Member Since: 23 Feb 2020
Location: North Yorkshire
Posts: 771

2008 Defender 90 Puma 2.4 HT Stornoway Grey

Here:-

https://www.defender2.net/forum/post853115.html#853115 Rgds.

Chris

21st Jul 2021 2:11pm

astroarcadia

Member Since: 12 Jun 2020
Location: Gloucestershire
Posts: 49

I have removed the actuator and the o ring retainer holding the arm. The arm will move but it very stiff and feels like it is almost grinding through three positions as I move it.

21st Jul 2021 2:44pm

astroarcadia

Member Since: 12 Jun 2020
Location: Gloucestershire
Posts: 49

Have revved the engine and the aviator arm move freely when revs given.

Also I get the click click click sound when I turn off. Does this signal the EGR is working correctly?

21st Jul 2021 3:02pm

astroarcadia

Member Since: 12 Jun 2020
Location: Gloucestershire
Posts: 49

I cleared the faults and took the vehicle for a run.

The MIL has remained off but the turbo does feel weak, its doesn't pull.

I plugged the reader back in and the only fault showing is P0234 - Intake boost pressure sensor input signals intake pressure above the maximum specified pressure by 4 psi for more than 5 seconds.

21st Jul 2021 3:14pm

Moffett

Member Since: 08 May 2018
Location: Sligo
Posts: 69

2008 Defender 110 Puma 2.4 XS CSW Stornoway Grey

I remember reading the actuator should feel quite loose? Not taken mine off..... yet..

4th Aug 2021 1:56pm

DefenderCat37

Member Since: 24 May 2023
Location: Essex
Posts: 7

2010 Defender 110 Puma 2.4 USW Stornoway Grey

astroarcadia wrote:
I cleared the faults and took the vehicle for a run.

The MIL has remained off but the turbo does feel weak, its doesn't pull.

I plugged the reader back in and the only fault showing is P0234 - Intake boost pressure sensor input signals intake pressure above the maximum specified pressure by 4 psi for more than 5 seconds.

Hi astroarcadia, I know this post was a while ago now, but I have a similar problem. Did you get to the bottom of what caused it?
Cheers.

8th Jun 2023 9:48pm

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