Golf 1.9TDI engine management light
Discussion
The engine management light (same as glow plug light but flashing) came on a three times on my drive into work today in my 2008 mk5 golf bluemotion 1.9tdi. It just flashed for a couple seconds then went off. Each time the engine was under light load, probably around 2k rpm. No loss of power, and jerkiness, just a few flashes of the light (with "engine fault workshop" coming up on the MFD. I ran it through 3rd gear a couple times on full load and the car feels exactly the same as usual. Fuel economy was unaffected (maybe a bit better than usual, only but 1 or 2 mpg better over a 40 mile journey so within tolerance of what I would expect).
A colleague is going to bring in his code reader for me tomorrow but I'm just wondering if this rings a bell with anyone or if anyone can shed any light on what it might be. I'm not confident anything will be logged as the light is off, hopefully it will have stored an intermittent fault.
A colleague is going to bring in his code reader for me tomorrow but I'm just wondering if this rings a bell with anyone or if anyone can shed any light on what it might be. I'm not confident anything will be logged as the light is off, hopefully it will have stored an intermittent fault.
Well it's back again! Came on frequently on the way in, always on light load, in all gears and even once in neutral whilst idling. Happens on both cruise control and driving normally, so can rule out a dodgy throttle pedal. Will try scanning it again later but the code reader I have access to isn't great! Will have to stop in at a friends garage when I'm around and use theirs!
It's worth noting that the battery was disconnected for about 24 hours over the weekend! Any ideas of things that might be on the way out and how to check them would be appreciated! All I can think is that it could be the MAF sensor, as it doesn't happen on high load/revs, when I imagine the boost gauge could be used to give the ECU it's load input.
It's worth noting that the battery was disconnected for about 24 hours over the weekend! Any ideas of things that might be on the way out and how to check them would be appreciated! All I can think is that it could be the MAF sensor, as it doesn't happen on high load/revs, when I imagine the boost gauge could be used to give the ECU it's load input.
Nick1point9 said:
Any ideas of things that might be on the way out and how to check them would be appreciated! All I can think is that it could be the MAF sensor.
Too random, get it scanned with a decent tool and you should get the pending codes.MAF rarely throws a code even when it's near-dead, in my exp.
Just went to take the car for a spin and the EML came on with the ignition, so scanned it before driving and got "P0546" which the book says is exhaust gas temperature sensor circuit too high.
Comes on almost every time I applied load now, and the car seems a touch down on power (might not be, just felt a touch down). What should I be looking at for a new one?
Comes on almost every time I applied load now, and the car seems a touch down on power (might not be, just felt a touch down). What should I be looking at for a new one?
Edited by Nick1point9 on Monday 14th January 13:48
What was an intermittent flashing EML is now a different warning light, the yellow outline of an engine (emission systems warning light?) on solidly, so will scan again and see if it's the same code. Less annoying though as the dash doesn't bing and light up every time I apply load...
Hey Nick, I know this is a very old post but I have a 2009 1.9tdi bluemotion golf and I have had exactly the same problems as you. the glow plug light flash up for a moment once a month or so for like 6-7 months, then more frequently, especially when under load, and then 3 weeks ago the engine light came on and is now constantly on with glow plug light popping up too, and now my turbo is off and my dpf regeneration is turned off and the dpf light came on too (I can only assume it is due to the computer turned anything that causes the exhaust temp to go up off because it thinks it's running too hot and it is trying to protect the cat converter).
Anyway, did you manage to work out which sensor was at fault and how did you work it out?
Cheers mate.
Anyway, did you manage to work out which sensor was at fault and how did you work it out?
Cheers mate.
My ODB2 scanner threw out the P0546 code (temp sensor in bank 1 reading too high, or something like that), took it to the garage to plug it into the VCDS, through out the same code (the code had different reference number, but description the same). So i guess it's temp sensor related, but i suppose until you examin everything you don't know whether it's the wiring to and from the sensor or the sensor itself.
Taking it to the garage tomorrow, will see what comes out of it.
Taking it to the garage tomorrow, will see what comes out of it.
Well, after talking with three garages, everyone seems to suggest that my DPF is the root of my problems. This effectively presented me with two options:
1 - replace DPF - £600+ as a starting point
2 - perform a DPF delete - £300-£400 depending on who is doing it. Not a very enviroment friendly option
what do yoou guys think?
1 - replace DPF - £600+ as a starting point
2 - perform a DPF delete - £300-£400 depending on who is doing it. Not a very enviroment friendly option
what do yoou guys think?
Take it to someone who knows what they're talking about - that sounds like a load of cobblers. A proper VCDS scan should identify if you have a faulty sensor and if so which one. If it's seeing higher than expected values that are genuine it should point to where in the aftertreatment the fault is.
At the very least IF any of it relates to the DPF you can get it cleaned rather than replaced.
Where are you based, in case anyone local to you knows a decent indy?
At the very least IF any of it relates to the DPF you can get it cleaned rather than replaced.
Where are you based, in case anyone local to you knows a decent indy?
Cheers Adrian, I'm based in Britol. this is what I decided:
Take it to the VW specialist to replace the sensor, which I am 99% confident is the problem, had it plugged in into VCDS scanner then manually tested the voltage, which confirmed the faulty sensor.
Once sensor replaced, I will force the regeneration process on the DPF, and only IF that doesn't clear it then I will consider other options.
I will keep this thread posted on the progress.
cheers
Take it to the VW specialist to replace the sensor, which I am 99% confident is the problem, had it plugged in into VCDS scanner then manually tested the voltage, which confirmed the faulty sensor.
Once sensor replaced, I will force the regeneration process on the DPF, and only IF that doesn't clear it then I will consider other options.
I will keep this thread posted on the progress.
cheers
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