Polo 1.6 TDI Limp mode after acceleration

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Polo 1.6 TDI Limp mode after acceleration

Postby Shaindren » Fri Aug 11, 2017 11:59 am

Hi All

I Have a 2012 Polo 1.6 TDI. This Morning after accelerating to overtake a truck, the car went into Limp mode with a flashing glow plug light. After switching the car off and restarting it, it's back to normal however, if you drive it hard over 3000 rpm, it goes back into limp mode.

Any idea what could be the issue here?

Car has been serviced 2 months ago, turbo sounds normal, no boost leaks.

Any help would be appreciated.posting.php?mode=post&f=91#

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Re: Polo 1.6 TDI Limp mode after acceleration

Postby Dewaldt » Fri Aug 11, 2017 2:08 pm

Hi,

I have post (1.6 TDI Polo 2012 )the something this morning and I have the same car and the ECU needs to be replaced, new one R 22 700 vat incl.....

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Re: Polo 1.6 TDI Limp mode after acceleration

Postby Neuk » Fri Aug 11, 2017 2:15 pm

DPF regeneration needed?
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Re: Polo 1.6 TDI Limp mode after acceleration

Postby Shaindren » Fri Aug 11, 2017 4:00 pm

ECU Seems to be fine as this was tested. DPF not the issue as a DP is fitted. Thinking may the EGR Cooler is gone. Will try getting it tested today. Fingers crossed

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Re: Polo 1.6 TDI Limp mode after acceleration

Postby Howie-WP » Fri Aug 11, 2017 4:05 pm

Came here to post "Are you driving Dewaldt's car???" :crazy:

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Re: Polo 1.6 TDI Limp mode after acceleration

Postby panic-mechanic » Fri Aug 11, 2017 6:54 pm

by what mechanism will a leaking oil cooler trigger an engine light?. Just trying to figure the logic? not saying it ain't just trying to figure how the management would know?
Try by getting a scan done and see if there is faults shown?.
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Re: Polo 1.6 TDI Limp mode after acceleration

Postby Shaindren » Fri Aug 11, 2017 7:55 pm

Hi all. Got a scan done by someone I know. It picked up a P0087 - fuel rail/system pressure too low.

Can anyone help with what could actually be done to fix this issue?

Panic, too much reading on the net before scan hence I thought the egr packed up lol.

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Re: Polo 1.6 TDI Limp mode after acceleration

Postby Tabiso » Sun Aug 13, 2017 12:58 am

I am not certain but one thing I can tell you, your boost sensor, need to be replaced and the head gusket. I had the same problem.

And Please note that, since the replacement of the parts, never drove over 130-180 and for now the car seem to be fine.


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Re: Polo 1.6 TDI Limp mode after acceleration

Postby Tabiso » Sun Aug 13, 2017 1:00 am

Anyway, panic. Your advise on the problem I had, so helpful.


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Re: Polo 1.6 TDI Limp mode after acceleration

Postby vtroubleume » Wed Aug 16, 2017 8:09 am

This is a common problem in most modern diesel turbo cars lately, In most cases a fuel pressure sensor gets replaced and will still read faulty because the "boost system " is not running up to the computer boxes tolerances standards . Most cases , the turbo's veins aren't working properly, the compressor wheels have ware on them, it can be a boost leak, a faulty boost sensor , a faulty fuel pump in the engine and not in the intank fuel pump . Hope they can sort it for you.
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Re: Polo 1.6 TDI Limp mode after acceleration

Postby 8VALVE-zn » Mon Dec 11, 2017 8:03 am

Any update on the fix to what the scan picked up? I got my car scanned this weekend and it is the exact same issue that you picked up as well.
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Re: Polo 1.6 TDI Limp mode after acceleration

Postby 4ePikanini » Mon Dec 11, 2017 9:05 am

Change the fuel filter as a start.

Get it scanned with VCDS and report back.
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Re: Polo 1.6 TDI Limp mode after acceleration

Postby 8VALVE-zn » Mon Dec 11, 2017 3:47 pm

Car went in for a service and the fuel filter was changed- after the service was done the car refused to start. The scan thereafter picked up the low fuel pressure error. Anyhow, tried a bit later and the car started just fine no clear signs of any problems
2000 Golf 1 Chico- CRANKCASE [Std bottom end, head gas flowed,ported & chopped by Fastcar, 288 Estas Billet, 4-2-1 43mm Brospeed Branch, 50mm-57mm-63mm Exhaust] + THE PART (2B1 speacials) -Final power @ Autotrix 111wkw & 210wnm :drool:

2011 Jetta 5 1.6 TDI DSG - CRANKCASE Tow Services [Durban Stock]

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Re: Polo 1.6 TDI Limp mode after acceleration

Postby Ashveer03 » Mon Dec 11, 2017 7:25 pm

8VALVE-zn wrote:Car went in for a service and the fuel filter was changed- after the service was done the car refused to start. The scan thereafter picked up the low fuel pressure error. Anyhow, tried a bit later and the car started just fine no clear signs of any problems
Probably because the filter was just empty.. normally takes a good few swings before its filled up again - vcds could also be used to run the intank pump to fill up the filter

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Re: Polo 1.6 TDI Limp mode after acceleration

Postby 8VALVE-zn » Tue Dec 12, 2017 9:01 am

Shot for that Ash, when we chatted further this was the method used to get the filter filled. The car has an issue starting from time to time.

It would crank- RPM doesn't move at -> Switch the car off and then on, crank again and it would crank to about 500rpm without taking start. Turn off again, turn the key on and wait 5-10 sec -> Crank again and the car will start with a very rough and jump idle. After driving for about a 2km everything smoothes out and car drives with no issues at all. Like mentioned before the scan reads an error relating to low fuel pressure.
2000 Golf 1 Chico- CRANKCASE [Std bottom end, head gas flowed,ported & chopped by Fastcar, 288 Estas Billet, 4-2-1 43mm Brospeed Branch, 50mm-57mm-63mm Exhaust] + THE PART (2B1 speacials) -Final power @ Autotrix 111wkw & 210wnm :drool:

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Re: Polo 1.6 TDI Limp mode after acceleration

Postby Ashveer03 » Tue Dec 12, 2017 9:57 pm

I honestly dont understand how a fuel pressure sensor would mess around with a rpm signal..
I take it as this is a common rail injection?
When the car eventually starts, is there any overfueling? I would go through the measuring blocks and check rail pressure and stuff while swinging..
There could be something stupid going on like air in the fuel lines or a mixed up fuel pipe (kind of unlikely to happen since the car does start and run)

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