Author Topic: VW Golf Mk7 - Glow Coil, DPF, flat battery?  (Read 557 times)

Offline chowe

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VW Golf Mk7 - Glow Coil, DPF, flat battery?
« on: 13 January 2021, 12:05 »
Alright Team

New to the Golf club, the proud owner of a Lupo for quite a number of years and recently upgraded to a 17 Plate Golf Estate 2.0 TDI. Bought it at 32k miles, with full-service history from a VW garage.

Driven it quite a bit over the Christmas period, lots of long drives for work. Most recently, its started to develop some issues that I hope you can help with:

1. Diesel Particulate Filter light came on, fixed by driving at 31-75mph as per owners manual.
2. A few days -after Glow coil warning light flashing, paired with EM light.
3. Next day- Battery low/ Car refuses to start on the drive.

Error codes that I read:

P2456 - DPF Differential Pressure Sensor
P0299 - Turbocharger/Supercharger Underboost
P2456 - Circuit Intermittant/ Eratic


The dealership has come and picked it up this evening. Hoping the can have a gander.

Anyone with experience/ have a bat at what could be the issue?

Thinking sensor issue, but that doesnt explain the flat battery?

Cheers
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Offline chowe

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Re: VW Golf Mk7 - Glow Coil, DPF, flat battery?
« Reply #1 on: 13 January 2021, 12:17 »
Note moved from other subforum  :smiley:

Offline fredgroves

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Re: VW Golf Mk7 - Glow Coil, DPF, flat battery?
« Reply #2 on: 13 January 2021, 12:35 »
Flat battery is quite common these days.

If your battery is 3 years or more old, it probably won't survive disuse over winter.

Get a new battery, clear the faults, make sure you drive it regularly.

And yes DPF's and the current "stay local" advice where you only drive to the supermarket once a week will almost certainly mean DPF clogging issues.
Current: 2017 Mk7.5 GTD,manual, NavPro
Gone: 2014 Mk7 GTD, manual, NavPro, DCC

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Offline mcmaddy

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Re: VW Golf Mk7 - Glow Coil, DPF, flat battery?
« Reply #3 on: 13 January 2021, 19:50 »
If you've been doing plenty of long journeys and still got the dpf warning then it could be just a sensor. Hopefully dealer will check status of the battery too 👍
TCR, Pure Grey, DCC, Dynaudio and Climate Screen.

Offline chowe

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Re: VW Golf Mk7 - Glow Coil, DPF, flat battery?
« Reply #4 on: 13 January 2021, 21:54 »
If you've been doing plenty of long journeys and still got the dpf warning then it could be just a sensor. Hopefully dealer will check status of the battery too 👍


Spot on, cheers.

The dealer has come back and said it was the sensor. Apparently, the battery issue is a result of the sensor malfunction (however unsure how that would be the case).