2010 Treg TDI won't start, cold and uphill - Club Touareg Forums
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post #1 of 14 Old 01-09-2017 Thread Starter
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2010 Treg TDI won't start, cold and uphill

Previously never had problems with cold starts but last night it went down to 4F and this morning car wouldn't turn over, tries for a bit then stops and gives various random fault codes. Only new thing was parking facing uphill. What should I do next? It's going up to around 20F later today. Call for a tow or wait? I don't need car imminently.
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post #2 of 14 Old 01-09-2017
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Random faults could mean the battery is done. Especially if you have never seen those faults leading up to this. When was i changed last?

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post #3 of 14 Old 01-09-2017 Thread Starter
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Electrics seemed to be fine... All lights, radio, etc. on after it failed to turn over. Should I try to jump it?
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post #4 of 14 Old 01-09-2017
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Quote:
Originally Posted by EdBoston View Post
Electrics seemed to be fine... All lights, radio, etc. on after it failed to turn over. Should I try to jump it?
Wouldn't hurt if you are able to do so.

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post #5 of 14 Old 01-09-2017 Thread Starter
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Quote:
Originally Posted by Yeti View Post
Quote:
Originally Posted by EdBoston View Post
Electrics seemed to be fine... All lights, radio, etc. on after it failed to turn over. Should I try to jump it?
Wouldn't hurt if you are able to do so.
Yeah, I should be able to do so later. Maybe I'll wait until the temp comes up to 20 and then try?

This close to the buyback I'm hoping for cheap/easy solutions...
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post #6 of 14 Old 01-09-2017
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Mine has been harder to start in the cold. I have my original battery still.

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post #7 of 14 Old 01-09-2017
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The battery is getting tired. Low voltage will cause all sort of random faults. Cranking speed needs to be high. Cold makes the oil thicker and the battery put out less power. A jump should get you going, and the VW goodwill package provides free roadside so it will be free. The number is 800-411-6688
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post #8 of 14 Old 01-09-2017 Thread Starter
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Quote:
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Mine has been harder to start in the cold. I have my original battery still.
Yeah, same here - sorry I didn't specify the battery age but it makes sense after 7 years. I had my wife listen for sounds from the engine compartment and there seems to be nothing -- just getting seemingly random fault indicators, then Treg gives up after a few seconds and the radio, etc. come on.

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The battery is getting tired. Low voltage will cause all sort of random faults. Cranking speed needs to be high. Cold makes the oil thicker and the battery put out less power. A jump should get you going, and the VW goodwill package provides free roadside so it will be free. The number is 800-411-6688
I didn't even think of calling but I definitely will. Much easier for me to sit in the warm house and just wait for them, rather than have to fiddle around with jumper cables in the cold, haha...
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post #9 of 14 Old 01-09-2017 Thread Starter
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My neighbor has a battery charger so I decided to try that rather than wait for roadside. The good news is that the engine tries to turn over now, and no more random fault codes. But it just won't start. I'm letting it charge more before trying again. Maybe there's not enough juice yet for the glow plugs? It's 20F outside now.
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post #10 of 14 Old 01-09-2017
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We don't normally get sustained temps below freezing, but recently we've has some days in the teens. The night before the cold front hit I hooked up the battery charger and let it on all night. In the morning it cranked fine. I did that every night for the 4 days of sub freezing temps and had no problems.


The reason I do this is because on the one freezing day we had last year everything totally died. The battery couldn't crank it fast enough to start - so it cranked about 30 seconds then that was it. If this was a more common occurrence I think I'd install a battery tender and pug in every night.

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