Please Help

Paulobeef

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I have a Skoda Octavia VRS TDI DSG 2015

For the last fortnight it's been holding back in acceleration, with the revs dipping whilst it's doing it...

Took it in for oil change service and asked them to run diagnostic on it, came back with this description..

_Codes on investigation P223700- O2 Sensor Positive Current Circuit Bank 1 Sensor 1 Open. P071600 Input Turbine/Speed Sensor A Circ Range Performance. Po32200 Ign/Distribtor eng speed inp circ No Signal. Oxy sensor advised to be replaced._

Oxy sensor replaced today by a different garage and another diagnostic ran and it's no better, In fact it flicked into engine management mode which was a not so nice change of pace..

Few things to consider for the experts

1) First 15 minutes of driving it's fine, after longer use it gets worse..

2) Sports mode seems to be the mode where it's best, which is somewhat concerning.

3) Lower Revs are worse but doesn't seem connected to a specific gear

Im clearly terrified it's a whole new DSG but surely 2 garages would have picked that up at the two points they've seen the codes

Any guidance welcome because I'm going to drive it into a river if it carries on, with me in it..
 

Crasher

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You need a proper VAG specific code read by a VAG group specialist or main dealer using VCDS or ODIS, very often generic code readers used by non specialist garages miss many codes, especially those that are brand specific, in fact many codes are misreported resulting in the wrong parts being replaced.
 

Paulobeef

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You need a proper VAG specific code read by a VAG group specialist or main dealer using VCDS or ODIS, very often generic code readers used by non specialist garages miss many codes, especially those that are brand specific, in fact many codes are misreported resulting in the wrong parts being replaced.
Thanks mate, I've sent a few messages off tonight to try to get it in tomorrow..

Any insight from the description just out of interest 👍
 

Paulobeef

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Possibly the gearbox input shaft speed sensor
So went to the garage, ran it on the diagnostic and diagnosed speed sensor, likely wiring...

Took it away and took it back yesterday for repair... In between, the car was okay but it came up with the DPF for the first time.

Drove it high revs for 30 minutes, fine never came back..

Took it back to the garage, didn't mention the DPF (I assumed it was based on shorter journeys because i was being careful with it) expected it to be fixed with the speed sensor being the issue...

He refurbed the DPF (Obviously seeing the diagnostic message) and took it out for 30 minutes with no issue..

Got it back, runs beautifully, really picked up pace and the best it's ever felt until the Engine management mode kicked in again this morning after a very small hols back

From the limited research I've done, this can point to something more serious like turbo/injector issues but I'm wondering if you have any more insight..

👍
 

Crasher

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Don’t go repaired, used or anything like that, stump up the (considerable) money for a new genuine unit and have it professionally fitted, it will need adapating to the clutch pack or they can burn out plus it is likely it will need a software update which needs to be done using the VAG diagnostic system ODIS or a “pass through”.
 

Paulobeef

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Don’t go repaired, used or anything like that, stump up the (considerable) money for a new genuine unit and have it professionally fitted, it will need adapating to the clutch pack or they can burn out plus it is likely it will need a software update which needs to be done using the VAG diagnostic system ODIS or a “pass through”.
Thanks for this mate, I've put a new post up on the board with the options I've been given...

Please let me know your thoughts on it...

Thanks so much for your help on this 👍
 
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