Engine error code - hope it's not DPF failure

[Arctra]

Hello Happy Tig-ites

So in the interests of educating me further on the amaizing error detecting and logging capabilities, my Tig threw up a new error today. While my girlfriend was driving home the engine light popped up on the dash. I just did a vagcom scan and found this:

Address 01: Engine (CBA) Labels: Redir Fail!
Part No SW: 03L 906 022 G HW: 03L 906 022 G
Component: R4 2,0L EDC G000AG 3396
Revision: 13H01--- Serial number: VWX7Z0HN3NP0SX
Coding: 0000175
Shop #: WSC 66565 257 00032
1 Fault Found:
001137 - Can't Decode, CODE File Not Loaded!
P0471 - 000 - Can't Decode, CODE File Not Loaded! - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 2 - The fault requires an immediate service appointment.
Fault Frequency: 2
Mileage: 28112 km
Time Indication: 0
Date: 2000.00.00
Time: 14:40:24
Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Voltage: 12.54 V
Pressure: 82 mbar
Pressure: 72 mbar
(no units): 0.0
Temperature: 37.8°C
Readiness: N/A

Looking up the code on the Ross Tech Wiki I find this (http://wiki.ross-tech.com/wiki/index...P0471/001137):

16855/P0471/001137 - Exhaust Pressure Sensor 1 (G450): Implausible Signal
Possible Symptoms

* Malfunction Indicator Light (MIL) ON

Possible Causes

* Wiring and/or Connector(s) from/to Exhaust Pressure Sensor 1 (G450) faulty
* Hose from/to Exhaust Pressure Sensor 1 (G450) faulty
* Exhaust Pressure Sensor 1 (G450) faulty

Possible Solutions

* Check Wiring and/or Connector(s) from/to Exhaust Pressure Sensor 1 (G450)
* Check Hose from/to Exhaust Pressure Sensor 1 (G450)
* Check/Replace Exhaust Pressure Sensor 1 (G450)

Now, correct me if I am wrong, but if it is just the sensor or the hose, it should be a warranty job - right?

Of late I have actually been noticing more frequent high idle revs normally associated with the DPF cleaning cycle and so feared my DPF was clogged up already, but this gives me some hope that it's not the case. I am really confused if it is failing early as I have taken Greg's advice on saving the DPF to heart and always try keep the revs above 2000rpm when driving so the turbo is boosting.

Anyway, any advice or opinions are welcome.

[h100vw]

I'd be seeing VW first, given the age of the car and the relative lack of Ks.

Gavin

[Arctra]

To my Dealer's credit, I sent him an email with details this morning first thing, and with minute's he had replied to me asking when I could get the vehicle in to him to look at. I can only get it in on Wednesday though (my fault, not the Dealers), so hopefully it holds out till then. He reckons if the light has gone off that it should be OK, but the sooner he can see it the better.

I'll keep you posted

[team_v]

Very interesting.
Hopefully all goes well on Wednesday.
Your's seems to have a few gremlins.

[ahyew78]

Hi Arctra

I hope the dealer can fix your problem next Wed!! Best of all, identify the root cause if there is any fault in it.

I went to the dealer today and they have cleared the fault but can't tell me the cause of it. This is annoying as you don't know what you can do to prevent it from happening again. I am not blaming the dealers as I think they are also trying their best to serve us as well as to identify the fault.

Anyway, hope all goes well.

[Transporter]

Hello Happy Tig-ites

So in the interests of educating me further on the amaizing error detecting and logging capabilities, my Tig threw up a new error today. While my girlfriend was driving home the engine light popped up on the dash. I just did a vagcom scan and found this:



Looking up the code on the Ross Tech Wiki I find this (http://wiki.ross-tech.com/wiki/index...P0471/001137):


Now, correct me if I am wrong, but if it is just the sensor or the hose, it should be a warranty job - right?

Of late I have actually been noticing more frequent high idle revs normally associated with the DPF cleaning cycle and so feared my DPF was clogged up already, but this gives me some hope that it's not the case. I am really confused if it is failing early as I have taken Greg's advice on saving the DPF to heart and always try keep the revs above 2000rpm when driving so the turbo is boosting.

Anyway, any advice or opinions are welcome.

Dean, you can check DPF loading with VCDS, or even force the regeneration process, if that's the problem (but I would leave it to dealer - it is better to have all the faults documented by the dealer for the warranty purpose).

[thejack72]

Hello Arctra,

My Golf threw up the same warning today! Luckily we were only 5 mins from a dealer and - unbelievably!!! - they were able to look at it straight away. They cleared the error & the service manager told me to book it in if it reoccured.

Unfortunately it did, about 40km's later.

He also told me it's not terminal and (if it did happen again) to just take it easy until they can investigate further. As we were leaving the mechanic told me it's not an uncommon occurance and said exactly the same possible causes as the Ross Tech Wiki - wiring fault, hose connection problems or the sensor itself may have failed. He also said it will take a few hours to pinpoint.

I realise it's a different vehicle & engine but I'll be very interested in hearing what your outcome is...

[Greg Roles]

For the record my TDI has been throwing the same error the last few weeks, and along with the engine speed sensor playing up, it's probably time to go into the stealer. Car's been running fine, so I haven't really worried overly. Those sensors just work out if the DPF is clogged and it needs a regen, and if they fail it just does them based on kms. Odd that mine is screwey but I'm not seeing any fast idling like yours, but still, all you're doing is wasting fuel, if anything it's prolonging your DPF by over regenning it!

I highly doubt you have DPF issues, as if it clogs if goes into limp and puts up a different light that looks like a DPF from what I've read, rather than the engine shaped light I certainly see my share of ( but I'm usually the cause of... ) This isn't the exact one, but you get the idea....it's not your typical light:



Sounds like a typical exhaust sensor failure, which is what I expect has happened to me, and I've read and heard of plenty of that happening. No major red flags there in my very uneducated opinion.

[Transporter]

I agree with Greg, and it is highly possible that your DPF didn't regenerate for some time cause of faulty sensor.

Sent from my HTC Desire using Tapatalk

[Arctra]

Close but no cigar...

So I dropped my Tig off with the dealer this morning for the 30,000km service and for them to sort my engine problem out. I did a 630km drive on Monday without any issues and without the engine light coming on again, so I wondered whether the dealer would detect the problem I had had.

I was disappointed when I got the call to say I could pick my Tig up and the guy told me they could not detect a sensor error and that it must have been that the DPF just needed a regen. I paid for the service and told them I was sure I'd be back in a week or two... I was wrong. I drove out the dealership and not 100m up the road the light came on! So I did a U-turn and without stopping the engine gave it back to them. They took it and scanned it straight away. After 10 minutes they gave me the loan car back and said they'd investigate the sensor more tomorrow.

So I have a Passat CC overnight to play with and I'll just wait and see happens tomorrow.

[Greg Roles]

Rather odd. When the engine light comes on in my TDI from me messing around I can get the error codes with Vag com on my laptop. The light doesn't come on without an error code.

[team_v]

At least you managed to get it back to them with the light on the second time.
Hopefully it is just a little gremlin and not the DPF being a pain.

[Arctra]

Well, I have my Tig back and she's running fine. Dealer said they replaced the exhaust gas pressure sensor (mine is not the first to fail) and tested it hot and cold without any problems. Hope that does the trick.

[Guest0608]

god they are slack, TDI G450 sensor fault in memory...10 mins to check and 10 mins to replace G450, adapt new sensor to ECU, roadtest, all good! Easy as.....vwtech.................

[Transporter]

Well, I have my Tig back and she's running fine. Dealer said they replaced the exhaust gas pressure sensor (mine is not the first to fail) and tested it hot and cold without any problems. Hope that does the trick.

That's good that you've got your Tig back.
What a quick fix, they must keep the exh. temp. sensors in stock now. Shame that you had to go back, they should replace it when they did service on it.