Hi, I just added to my Land Rovers with a Disco 2 2003. Only had it a couple of days and it popped up the ACE red warning light. I have a NANOCOM and have the following faults:

18-04 hydraulic or mechanical fault in pressure control system
42-07 hydraulic pressure too low.

These are the readings with a NANOCOM (looking at threads some questions raised on ACE fault code accuracy)
engine off. engine on
Battery V 12.28 14.28
DCV1 0.02 0.02
DCV2 0.01 0.01
PCV .05 0.17
Pressure sensor bar 10.66 15.67
residual 20.00 4.82
ULA -00.03, 0.04
LLA 0.12 0.14

There does not seem to be a leak and fluid is at the max. Guess this might be the pump but any advice would be great as it is intermittent and don't have a good vehicle to compare to.

Hi, if there is serious fluid activity in the reservoir at idle it might be the pressure transducer.... if the fluid doesnt circulate hard then the pump is gone or the PO lost fluid then after fixing it he didnt prime well the pump

Same as mine I think, pressure transducer.

Luckily mine cleared, just what I needed across the Cambrians

The only argument against the transducer is that it used to trigger the amber warning not the red one but it's not a rule

sierrafery said:

Hi, if there is serious fluid activity in the reservoir at idle it might be the pressure transducer.... if the fluid doesnt circulate hard then the pump is gone or the PO lost fluid then after fixing it he didnt prime well the pump

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Thank you I will check fluid level again and activity at idle. I assume if both good I need to replace the pressure transponder and see! I do appreciate the advice.

kingy08 said:

Thank you I will check fluid level again and activity at idle. I assume if both good I need to replace the pressure transponder and see! I do appreciate the advice.

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Hi I have checked level and there is good activity in the reservoir at idle. Now going to replace the transducer - looking at the prices seems you can get one for about £20.00 on ebay vs 100-200 does anyone have experience of £20 part - do they work or just cheap junk?

kingy08 said:

seems you can get one for about £20.00 on ebay vs 100-200 does anyone have experience of £20 part

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Is that a new chinese part or used genuine?... i didnt see such cheap ones by new

This is an example