2010 Octavia 1.6 Diesel 

 

Approx 2 months ago notice a whining sound from about 100 KM to 110 KM. It would be really noticeable between these speed. 

Diesel Particle Filter light would come on and off.

Took it for a good run... particle filter light gone.  

Got full service 3 weeks and was told engine was 100%.. diagnostics were fine.. filter was fine and said they did not notice the whine although they did not drive the car at that speed. 

Passed NCT in March also... without a problem 

 

Today

Diesel partice filter light came on again

Then the Engine fault return to workshop

Car has the flashing Glow light came on 

And is in Go home mode...so I am crawling 

Have turned off the engine and on again but still in this mode,

 

Anyone any ideas on the Whining sound could be at that specific speed? 

Or 

Why the diesel particle filter light keeps coming on... 3 times within a month despite long drives...

Or 

How to get it our of the Go home mode 

 

 

Any advise greatly appreciated.

 

JB

 

 

 

 

 

Is the wine only dependant on speed on not engine revs? If so then it could be something like a wheel bearing.

 

As for the DPF light it could be a dodgy pressure sensor etc. Sometimes they don't show up on a diagnostics if they're still reporting readings within spec.

 

And lastly there is no way to get it out of "Limp Mode" (is what it's called). You have to basically fix what is causing the fault to get it out of it.

As for the dpf light have this myself at the moment. It is the exhaust temperature sensor 4 on mine you need to get it scanned and look out for unusual temperature readings.sensor 1 is before the turbo sensor 3 before dpf sensor 4 after dpf on mine sensor 1 and 3 look ok.

Sensor 4 very low temps.New sensor getting fitted on Monday.The garage missed this twice and just regenerate the dpf skoda assit guy was great

Edited 9 April, 201610 yr by firefox2

Thanks both 

 

The whine is speed dependent... revs have no effect... thanks for that. 

 

On the Limp Mode... looks like a trip to the Skoda garage to get it fixed.

 

Many thanks both for replying

About DPF. Maybe it's a faulty sensor like people mentioned before or maybe your DPF is on it's way... the older it gets, the worse will it work.

If it's not a sensor then it means that filter is way too full with crap to regenerate on itself and it needs forced regeneration started by software. Limp Mode can be removed with software (VCDS) or maybe even with Carista app or something similar. At least it might have temporary effect

 

But if you haven't had problems with DPF before and somehow it seems too bad then maybe it's that sensor.

 

About that weird sound - maybe it's tyre related?

As an update and looking for help???

 

Dropped the car into a Skoda dealership

 

They have told me that I need to replace the EGR Valve as cars computer is showing it as a permanent fault.... 1250 Euro to replace.  

 

Then and only then can they check the other errors...

 

Does this sound right?

As an update and looking for help???

 

Dropped the car into a Skoda dealership

 

They have told me that I need to replace the EGR Valve as cars computer is showing it as a permanent fault.... 1250 Euro to replace.  

 

Then and only then can they check the other errors...

 

Does this sound right?

Price sounds about right as the EGR is tucked behind the engine where access is very restricted so it's a big job to replace it. 

But the solution doesn't sound right at all. EGR can be disabled much cheaper and it won't die ever (your new EGR might die rather soon). Read about that in this forum.

You won't have any problems in MOT either because they can't check that.

It's even healthier for your car not to have it. The only benefit of it is a bit faster warmup but it's only a little thing compared to disadvantages.

Then and only then can they check the other errors...

 

What other errors?

 

When they plugged the car in to read the fault code for the EGR any other fault codes (or errors) will have been visible to them at the same time.

 

I wouldn't have the EGR replaced at a main dealer, the same standard of work can be achieved elsewhere for much less money whilst still using genuine Skoda parts.

 

Shop around.

They said other error was the DPF 

 

But they could only check that once they had replace the EGR. 

 

What I don't get is that I have not had an issue with the car prior to this... full service history, no issues with the car and then bang....!!! 

 

I took the car out tonight of the dealer and going to my normal guys

The dealer is talking rubbish.

 

They do not need to fix the EGR before being able to check the DPF.

 

The DPF ash content can be measured at any time and any issues with the sensors will almost always result in a fault code being logged.

 

Sounds like taking the car off them will be a good move.

Have dropped into my normal guys this morning... should have done that in the first place..!!!

 

Will post the result.

 

Many thanks all for your responses... of great help