EML on. Which exhaust gas temperature sensor ? Please Help

[Radders567]

Hi all. My Father has a 57 plate passat 2.0 TDI 170 PD with DPF. Recently the EML came on. I have run a scan with VAG COM (VCDS) and it has reported the following codes.

005213 - Exhaust gas temp sensor 3 (P145D) -006. Frequency 93 times. This did not bring on the EML.
and

009259 - Exhaust gas temperature sensor B1 S3 (P242B). Frequency 4 times. This is the one that brought the EML on.

Could anyone tell me where the sensors are located and how difficult they are to change. A guide / pics / part numbers would be nice if possible.
Also is there anywhere else that I could buy the sensors from or is this main dealer only.

Many thanks in advance for your help.

[martin1810]

Hi all. My Father has a 57 plate passat 2.0 TDI 170 PD with DPF. Recently the EML came on. I have run a scan with VAG COM (VCDS) and it has reported the following codes.

005213 - Exhaust gas temp sensor 3 (P145D) -006. Frequency 93 times. This did not bring on the EML.
and

009259 - Exhaust gas temperature sensor B1 S3 (P242B). Frequency 4 times. This is the one that brought the EML on.

This should be in the top of the dpf canister in the middle with the lambda probe next to it.

Could anyone tell me where the sensors are located and how difficult they are to change. A guide / pics / part numbers would be nice if possible.
Also is there anywhere else that I could buy the sensors from or is this main dealer only.

Many thanks in advance for your help.

see above in red

[Radders567]

Hi I have been to VW main dealer and he has given me a print off of the page showing the Turbo / DPF (Illustratio No. 906-15). From what you have told me I beleive the sensor I need for my dad is the EGTS P/N 03G906088 (Number 10 on diagram) @ approx £112. Does this seem about right to you ?

Many thanks

[martin1810]

Yes that looks like the one but it's not easy to be certain. All the info I have points to this one but that don't make it correct.

[DMitch16]

I have just changed this one and it is UNDER the turbo. The newest part number is 03L 906 088 BS and surprisingly does not have the metal heat wrap (last 4 or 5 inches up to the solid piece of the sensor) anymore which was on the old part (03G 906 088 AN).

The electrical connection is one of three connected on the small bulkhead rack to the right of the turbo / air intake pipe (viewing from the front). The loom goes to the ECU from there and has on my 07 plate B6 (should be the same?) a black 2 pin, a brown 2 pin and a black 6 pin connector. They all route left running across 2 plastic bulkhead routing clips then across to a metal clip on the engine. The EGT sensor wire then drops vertically and is attached under the turbo to the DPF area. On my car it is the left one of the 3 (2 pin black) on the bulkhead rack.

Changing for the amateur mech is QUITE difficult and will take time if following say the Haynes manual procedures (remove air boxes / pipes, nearside front wheel, driveshaft etc, etc but removing these no doubt does make it easier to access the sensor nut if you have the time to spare. I did mine from underneath the car by removing the undertray, the additional plastic shield and the exhaust heat wrap which then gives pretty clear visibility to the sensor. It is a tight space and spanner leverage slight to say the least. The new sensor can be lowered from the top and fastened...my torq wrench is small and thinner than some.

I shouldn't need to mention that ALL safety precautions should be followed when working under a raised vehicle but I will.

Hope this helps? VW will charge £265 for the part (£112.50 + VAT) and labour (£109.00 plus VAT) for replacement.

[Radders567]

DMitch16 - What makes you think it is the lower one over the upper one on top of the DMF ?. I hope it is the upper one because my dad has just ordered and paid for the upper one. They both have the same part number except for the lower one had the letter B at the end when I looked at the computer at the main dealers. Martin1810 - Can you shed any light on Mad Mitches post ?.


Thanks to all once again for you help and time.

[davidjmac]

Hi,

I have exactly the same problem with exactly the same car. About 3 weeks ago it had a forced regen from my local dealer and they reported the filter clean. A couple of days ago the DPF light came on followed within hours by the EML. Taking the vehicle back to the dealer they are reporting the DPF is above 90% and it cannot be regenerated. I said i thought they were able to be regen'd up to 95% and why has it blocked so quickly and they claim it has a failed temperature sensor which meant the regens have been unable to be carried out and as the sensor is in the DPF the filter needs replacing anyhow. My questions are;

How did it go from good to +90% in hours without warning?
Is the sensor replaceable?
Is the +£2K they want to fix it reasonable?

Regards, David

[DMitch16]

Hi David,

The sensor is replaceable and charged by VW as per my earlier replies in this post. DIY costs vary depending on which temp sensor has failed, again read my earlier replies.

Get the sensor replaced first. The purpose of the DPF light (MIL dash warning) is to report when the DPF requires a regeneration (having not been able to perform either passive or active regenerations itself) at which point you should proceed with a forced regen by driving for at least 20 minutes at 2000rpm minimum this is around 60mph in 4th gear - for DSG gearboxes either put the gear lever in the sequential mode and work up to 4th or use sport mode which will give you the higher revs versus speed. Ensure you can drive continuously at these levels for the duration i.e. make sure you keep the revs up and have enough fuel in the tank. The fact that the DPF light came on is a normal process to warn you that the regen has not happened and the soot levels elevated but this should not mean that the DPFs life has ended.

I wouldn't be surprised at the dealer figure of £2K though for sorting this but you are lucky my friend as there is a firm called Turner Automotive (aka Turner Diagnostics) in St Albans who deal with the cleaning of blocked DPF units at around £265. Might be worth you looking into this option perhaps if you can't force a regen or VW want too many arms and legs!!?

[davidjmac]

Turner Automotive (aka Turner Diagnostics) in St Albans who deal with the cleaning of blocked DPF units at around £265. Might be worth you looking into this option perhaps if you can't force a regen or VW want too many arms and legs!!?

Thanks Mitch, Turner were helpful. They said that we ought to check the VW garage did the regen, ask for proof - of which we are still waiting. The VW garage said they did do the regen and the reason it went from nearly 0 to 215% in 8 weeks is due to a failed turbo. Thoughts?

[DMitch16]

Soot build up is rapid in turbo diesels especially when the regenerations don't happen due to other issues. A failed turbo shouldn't directly cause the soot build up but whatever prevents the regenerations will e.g. faulty sensors. The light (DPF - exhaust symbol) should come on at roughly 55% of DPF saturation. Regens usually happen at around 40 to 45% saturation and you should never get the light on if all is well but each brand of car is slightly different of course. Once roughly 75% is reached it is more unlikely that a successful regeneration would take place (unlikely but not impossible) and dealer / auto shop intervention is advisable. At 95% saturation and above most dealers write off the DPF and would replace it. In your situation it very much depends how long the car was driven after the DPF light illuminated (if it did) as it does not take long for the soot to build up in the DPF.

The Turner guys deal with this type of issue regularly and have much more experience / expertise than I do but new replacement DPF units are around £650 upwards.