Author Topic: CEL + Backfiring  (Read 1155 times)

Offline Mk6_matty_b

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CEL + Backfiring
« on: 21 December 2020, 18:05 »
Ok so I've had my Mk6 GTi 2 years now and for the past year I've had my check engine light on and off along with the EPC light, I've gone through every possible fix, upgrade of coil packs, spark plugs, cam shaft sensor, yet it's still showing the check engine light, and backfiring quite alot! The car is still stock but due for a stage one this week!! I'm desperate for help here as I'm getting worried I have injector failure, I have had it plugged it, showing so many codes and faults including misfires across all 4 cylinders! Sooo I'm reaching out now for some advice and help!

Online Snoopy

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Re: CEL + Backfiring
« Reply #1 on: 22 December 2020, 07:01 »
Not easy to diagnose over the internet. You maybe better off taking it to a specialist and getting them to give it a look over.
Current VWs:    Mk6 GTI    Mk1 GTI    Mk1 Leon

Offline Mk6_matty_b

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Re: CEL + Backfiring
« Reply #2 on: 23 December 2020, 15:19 »
Well I've had a code of p0172, so I've no clue what that means as I'm not to up on my mechanics or codes, I now been advised it's an air flow issue or the air flow mass sensor, and having a k&n air filter in it can throw out this sensor, how true this is I don't no either?? I'm getting more and more tempted to put it in a dealership it's just the cost as you can imagine!

Online Snoopy

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Re: CEL + Backfiring
« Reply #3 on: 23 December 2020, 17:00 »
Don't  use a dealer find a VW independent specialist in your area.
Oil from K&N can upset the MAF sensor.

Fault codes and possible causes can be found on the below link.
http://wiki.ross-tech.com/wiki/index.php/Category:Fault_Codes


P0172
http://wiki.ross-tech.com/wiki/index.php/16556/P0172/000370
Current VWs:    Mk6 GTI    Mk1 GTI    Mk1 Leon

Offline ramrod

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Re: CEL + Backfiring
« Reply #4 on: 25 December 2020, 22:43 »
fuel injector on its way out
Mk6 Gti - current daily
Mk3 16v Anni - retired daily now parked on 200,300 miles

Offline roblyt

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Re: CEL + Backfiring
« Reply #5 on: 06 January 2021, 07:18 »
id go with ramrod
sounds like mine when an injector went down