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Main dealer unable to fix intermitent faults superb mk3

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My skoda superb automatic diesel has been experiencing a braking/ juddering intermittently, displaying the attached faults. 

 

In most cases the faults clear after restarting engine. Work undertaken so far includes glow plugs, pressure sensor, new tyre...advised by skoda that tyre was causing speed sensor issue,  new battery, timing belt and coolant pump and G28 sensor.

 

Car collected after recent work, failed the same evening with identical faults. Once faults are in place the car doesn't  change up in 3rd unless you ease off accelerator.

 

Whilst car appears to brake or judder on off, the throttle needle can been seen jumping up and down slightly.

 

Has anyone experienced anything similar or have a solution as skoda haven't yet  come up with a solution?  

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You’d first have to look at the fault codes and post them here for us to have an idea.

 

next would be looking at live data for wheel speed sensors and seeing if one is doing something odd.

 

the tpms and esp light together I understand but the diesel emissions light id take a guess is a different fault.

Have you hit a pothole at all?

 

I hit a pothole and all those warnings came up but they did go off a wee while after. Turns out my alloy was badly dented on inner rim.

 

Might not be the same thing but worth considering.

Would some of the missing systems suggest something other than a speed sensor fault? 

E.g. Road sign recognition

 

Perhaps a CAN related fault or bad ground? 

Have you had your battery checked?  A lot of weird things can be caused by a duff or failing one.

4 minutes ago, skomaz said:

Have you had your battery checked?  A lot of weird things can be caused by a duff or failing one.

Second this.

It is insane how many spurious faults seem to be kicked off by a weak/dodgy battery.

Weak battery can make a real mess, I agree.
Another option: harnesses chewed by a rodent.

 

A rodent had chewed 4 different harnesses on my wife's Audi Q3 indeed. No less than 28 cuts!
This raised fault codes on brake fluid level sensor, Oil level sensor, front parking sensor, gearbox neutral position sensor.
Thus, no front park assist system, no Stop & Start, no low oil level monitoring, red warning on brake system, and consequently, no ABS, no ESP.

Fortunately, owning a VCDS allowed me to diagnose all affected harnesses. It took me a whole day to fix this, (cause I'm not very skilled at electrical wire welding 😁).
But I saved ~€800 compared to a repair by an Audi dealer...

8 hours ago, Bap33 said:

Another option: harnesses chewed by a rodent.

This is quite a common fault here too, so much that there a special insurance extra for damage from animals chewing things

22 hours ago, skomaz said:

Have you had your battery checked?  A lot of weird things can be caused by a duff or failing one.

Original post says that the battery has already been replaced

  • Author

Thanks all, back at the garage to do further fault testing, will let everyone know the result.

9 hours ago, ed5000 said:

Thanks all, back at the garage to do further fault testing, will let everyone know the result.

Good luck! 🤞

  • 2 weeks later...
  • Author

Update, car is ready for collection. Faulty crankshaft sensor.

8 minutes ago, ed5000 said:

Update, car is ready for collection. Faulty crankshaft sensor.

 

Trying to understand how a crankshaft sensor could throw up all those codes but you never know.  Hopefully it is fixed once and for all.

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