C5 2.0 hdi 55 reg power steering problem

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mark230678
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Re: C5 2.0 hdi 55 reg power steering problem

Post by mark230678 » 30 Sep 2018, 17:33

No one local can do it.

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Re: C5 2.0 hdi 55 reg power steering problem

Post by GiveMeABreak » 30 Sep 2018, 17:48

Not all members are active all the time, so be aware, but it may help if you provided your location in your profile, as somebody may read your post who is not on the list.

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Re: C5 2.0 hdi 55 reg power steering problem

Post by mark230678 » 01 Oct 2018, 14:56

Had it on lexia. P0601 and 0602 are showing on the steering.

Have a feeling it may be steering sensor.
At full left lock it is at 0.

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Re: C5 2.0 hdi 55 reg power steering problem

Post by GiveMeABreak » 01 Oct 2018, 15:05

Let me check for you....

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Re: C5 2.0 hdi 55 reg power steering problem

Post by GiveMeABreak » 01 Oct 2018, 16:01

Ok, I really need your VIN as I need to ensure I'm looking at the right system. Post it here (it will be masked automatically).

P0601 and P0602 are ECU failure faults - either with the EEPROM or internal failure. However I do need to check this out using the VIN.

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Re: C5 2.0 hdi 55 reg power steering problem

Post by mark230678 » 01 Oct 2018, 16:26

VF7**************[VIN obfuscated, can be read by forum staff]

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Re: C5 2.0 hdi 55 reg power steering problem

Post by mark230678 » 01 Oct 2018, 16:27

Still working and driving fine.

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Re: C5 2.0 hdi 55 reg power steering problem

Post by GiveMeABreak » 01 Oct 2018, 17:06

P0601 or P0602
mark230678 wrote:
01 Oct 2018, 14:56
Had it on lexia. P0601 and 0602 are showing on the steering.

Have a feeling it may be steering sensor.
At full left lock it is at 0.
If your Steering Wheel Angle Sensor was at fault, the ABS / ESP system would throw up a fault on the dash, as that system is used to inform the ESP ECU as to steering angle - if it is not sending correct data it would disable the ESP and ABS system for safety reasons and would also provide fault code readable with Lexia, starting with a 'C'. So not that.

Although a 'P' code is a Powertrain code, I am not getting a specific fault code P0601 or P0602 for this engine ECU (Siemens SID 803) - are you sure you are using a Lexia with Laptop?

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Re: C5 2.0 hdi 55 reg power steering problem

Post by mark230678 » 01 Oct 2018, 17:27

Yep will try again tomorrow

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Re: C5 2.0 hdi 55 reg power steering problem

Post by mark230678 » 01 Oct 2018, 17:29

Says GEP at the top of the page.
Did have a question mark when reading faults next to steering

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Re: C5 2.0 hdi 55 reg power steering problem

Post by GiveMeABreak » 01 Oct 2018, 17:48

Ok, any screen prints will be helpful. GEP is the Electronic Steering Pump - so if it cannot communicate with the ECU, that is a good place to start checking the connections and ensuring there is no corrosion / water ingress in the unit - re-check all connections are tight and secure and also that there are no trapped / pinched or exposed wires that you can see.

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Re: C5 2.0 hdi 55 reg power steering problem

Post by mark230678 » 01 Oct 2018, 18:31

Will do. Pump runs on test.
Where can I find all the bits

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Re: C5 2.0 hdi 55 reg power steering problem

Post by GiveMeABreak » 01 Oct 2018, 18:43

The power steering pump is located behind the right hand wheel arch near the front. You'll need to remove the right hand wheel and the arch liner to get to it.
C5 II Power Steering Pump A.PNG
(12)LDS fluid reservoir.
(13)High pressure piping.
(14)Distribution valve.
(15)Steering mechanism.
(16)Low pressure piping.
(17)Power steering electropump assembly.
The flow provided by the power steering electro-pump varies as a function of the following parameters :
Vehicle speed
Speed of turning the steering wheel

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Re: C5 2.0 hdi 55 reg power steering problem

Post by mark230678 » 02 Oct 2018, 18:30

Right.
To re-address this. I checked the fluid. As I found the breakdown checked broke fluid not steering.
The reservoir was pretty dry.
Bought some fluid. 1 litre. And is still not filled.
Not had chance to look under yet.
But no patches on drive.
Light is still on.

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Re: C5 2.0 hdi 55 reg power steering problem

Post by GiveMeABreak » 02 Oct 2018, 18:47

If I read what you said right - you think the breakdown chap checked the brake fluid not the suspension fluid? Why am I not surprised!

Remember it must be checked on level ground in the lowest suspension setting. Only use LDS fluid - this is critical and fill BETWEEN the narks shown on the previous page on the diagram I posted.

You will have a leak somewhere, as you won't lose that amount of fluid through normal use - you probably aren't seeing a leak as the fluid has seeped out before now and is dangerously low.

You need to park it overnight on an oil-free area so that you can identify where the leak is coming from and take a few pictures if possible. Check under the steering rack, and anywhere under the body, front to back as the suspension pipes travel backwards to the rear systems. Check the suspension struts - at the front if you see oil running down, it may just be the oil return pipe that has split and this is an easy fix. Let us know.