Quick FYI thread as I didn't find much when I googled for this fault code I had pop up last week:

 

Address 44: Steering Assist (J500)       Labels:| 5Q0-909-144.clb
   Part No SW: 3Q0 909 144 L    HW: 3Q0 909 144 L
   Component: EPS_MQB_ZFLS  507 5081  
   ASAM Dataset: EV_SteerAssisMQB 015157
   ROD: EV_SteerAssisMQB_015.rod

1 Fault Found:
24320 - Steering 
          C10AC 07 [009] - Mechanical Failure
          [Belastungszähler hat 99% überschritten Belastungszähler hat 100% erreicht]

 

Despite the rather worrying statement that there is a 'mechanical failure', it turns out at least in some cases, it can be resolved via a simple software update.

 

TPI: 2056240/2

Customer statement:
- Power assisted steering efficiency decreased.

- Red power steering warning light is on in the instrument panel.

Workshop finding:
- Customer statements can be reproduced.
- A static entry with one or several symptoms mentioned is logged in the event memory of the power assisted steering control unit (address 44):
        C10AC07 – Steering mechanical malfunction
        Symptom 24320 (05F00), or 24321 (05F01), or 24324 (05F04)

 

Production change
- Find out the current SW version of the power steering control unit (diagnostic tool ODIS, diagnostic address 44, identification of the control unit).
- If the SW version of the power steering control unit found out is identical with the data shown in the Table (current control unit), choose the proper measure code and update the software

 

Current control unit		Measure code		Updated control unit
5Q0909144AA / SW1081		34EC			5Q0909144AB / SW1082
3Q0909144L / SW5081		34FC			3Q0909144M / SW5082
5QN909144A / SW5081		34FC			5QN909144B / SW5082
5QF909144A / SW5081		34FC			5QF909144B / SW5082

 

My local dealer did the update for me earlier and I'm pleased to say the fault code has gone

 

Address 44: Steering Assist (J500)       Labels:| 5Q0-909-144.clb
   Part No SW: 3Q0 909 144 M    HW: 3Q0 909 144 L
   Component: EPS_MQB_ZFLS  507 5082  
   ASAM Dataset: EV_SteerAssisMQB 015157
   ROD: EV_SteerAssisMQB_015.rod

No fault code found.

 

Hopefully this helps someone else with a similar issue in the future, other brands may have a different TPI number 

On 29/07/2021 at 20:45, langers2k said:

Belastungszähler hat 99% überschritten Belastungszähler hat 100% erreicht

For those who don't speak German -

 

Load counter has exceeded 99% Load counter has reached 100%

I have the above on my superb... only seen it as i connected vcds to check on particulate filter oil ash load...

 

but everything works fine and i do not get: 

- Power assisted steering efficiency decreased.

- Red power steering warning light is on in the instrument panel.

 

 

- Power assisted steering efficiency decreased.

- Red power steering warning light is on in the instrument panel.

 

Did you get any symptoms like above?

I didn't notice any symptoms...

 

It was just the fault code so I mentioned it when I took the car for a service and they did the update with no further questions asked