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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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t5 troubleViews : 625 Replies : 8Users Viewing This Thread : |
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Jun 25th, 2018, 15:55 | #1 |
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t5 trouble
Hello, I bought a 1999 v70 T5 auto last week and had my first proper drive on Saturday, it ran perfectly.
I started it on Sunday and it didn't idle right, I drove it for a minute and the engine management light came on and it went into limp mode. I bought a scanner and it came up with P0121 stored which is ETM? What could the problem be, clean the ETM, new ETM? Any help would be much appreciated |
Jun 25th, 2018, 16:41 | #2 |
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Always start with the cheapest and easiest solution! Give the ETM a clean. I'd also check if the car ever had the recall associated with bad ETMs.
A bit more info here: https://www.matthewsvolvosite.com/vo...-module-fiasco
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1995 Volvo 850 T5 Estate (Manual) |
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Jun 25th, 2018, 23:16 | #3 |
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Also check your intake pipework from the maf as well as a substantial leak from there to the turbo can actually bring the fault code up as well.
The plastic pipes are prone for splitting at the turbo end and it's not always apparent till to remove them off the turbo inlet.
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Jun 26th, 2018, 18:50 | #4 |
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I took the pipe off but it was in good condition so I can rule that out, what an awkward job.
If I do need to a new EMT what is the best thing do to? Volvo want £500 to fit one + I would actually have to get it there. Would an £80 contactless throttle position sensor from ebay solve my problem and is just a stright swap no software involved? I understand they have to programmed for the specific car is it something you can diy? |
Jun 26th, 2018, 22:12 | #5 |
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Hi,
As far as I understand (I haven't done a contactless conversion myself yet but I have changed a number of ETMs), the Sacer contactless is a good option. You won't need to reprogramme anything if the ETM is going back on the same car. If you don't want to have to reprogramme a used one then as far as I understand it, if yours is a turbo, then get one from a car with a turbo, likewise if normally aspirated get one from a car that is normally aspirated. I can't remember whether the white label was used on the original ETMs and the yellow label on the more recent ones. Sorry you'll have to google it! Then aim to buy the most recent. Hope that helps. Steve
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V70 2.5 Turbo AWD Man. 1999 Red V70 2.5 10V Auto 1998 Green C70 T 20V Auto Conv. 2001 Blue, C70 T5 Auto Conv. 2000 Blue V70 2.5 Turbo AWD Auto 1998 Green, V70 2.5 10V Auto BiFuel 1999 Red (scrapped) V70 20v Auto 1999 Green (scrapped) |
Jun 26th, 2018, 22:16 | #6 |
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PS
Use a new gasket for when you put it back in, because you don't want any air leaks. Get a couple, they only cost a few pounds.
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V70 2.5 Turbo AWD Man. 1999 Red V70 2.5 10V Auto 1998 Green C70 T 20V Auto Conv. 2001 Blue, C70 T5 Auto Conv. 2000 Blue V70 2.5 Turbo AWD Auto 1998 Green, V70 2.5 10V Auto BiFuel 1999 Red (scrapped) V70 20v Auto 1999 Green (scrapped) |
Jul 1st, 2018, 17:42 | #7 |
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I installed a contactless throttle position sensor, the car ran well for about 15 minutes then went into limp mode again.
I scanned it and it comes up with p0121 It is intermittent, I can turn it off and on again and run perfect for 10min then limp mode. My etm had a white sticker and I noticed some corrosion on one of the bolts inside. So whats next now, new etm altogether? |
Jul 1st, 2018, 20:12 | #8 |
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Hi Spare,
In case it helps, there is a diagnostic flow chart for ETM failures. https://xemodex.com/us/electronic-th...olvo-services/ Steve
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V70 2.5 Turbo AWD Man. 1999 Red V70 2.5 10V Auto 1998 Green C70 T 20V Auto Conv. 2001 Blue, C70 T5 Auto Conv. 2000 Blue V70 2.5 Turbo AWD Auto 1998 Green, V70 2.5 10V Auto BiFuel 1999 Red (scrapped) V70 20v Auto 1999 Green (scrapped) |
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