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Author Topic: Exhaust Emissions Warning Light  (Read 2603 times)

Offline brewey

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Re: Exhaust Emissions Warning Light
« Reply #10 on: 13 April 2013, 23:44 »
It will sort itself out eventually but could be between 20 and 100 miles maybe more. I didn't use vagcom to align mine and it was ok, but that doesn't mean it shouldn't be done.

Is yours DBW or cable? Sorry if its obvious but I don't own a 2.0l if it is DBW be careful not to move the butterfly valve forcefully as it is controlled by a stepper motor.
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2000 1.8T ARZ - OEM+

Offline ollyjg

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Re: Exhaust Emissions Warning Light
« Reply #11 on: 14 April 2013, 00:04 »
Quote from: brewey on 13 April 2013, 23:44
It will sort itself out eventually but could be between 20 and 100 miles maybe more. I didn't use vagcom to align mine and it was ok, but that doesn't mean it shouldn't be done.

Is yours DBW or cable? Sorry if its obvious but I don't own a 2.0l if it is DBW be careful not to move the butterfly valve forcefully as it is controlled by a stepper motor.

I am a relative newbie when it comes to this; how would I find this out?
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Offline ollyjg

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Re: Exhaust Emissions Warning Light
« Reply #12 on: 14 April 2013, 16:26 »
Just been outside to find my engine code and I'm pretty sure it's AQY?

Also I started her up and noticed quite a lot of black deposits being thrown out the exhaust, as well as some dark fumes. Could this explain my CEL and possibly hint towards Lambda sensor?
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Offline ollyjg

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Re: Exhaust Emissions Warning Light
« Reply #13 on: 17 April 2013, 17:11 »
Anyone got a guide to getting at and checking coil packs on a 2.0 gti? Bit of a novice when it comes to cars...
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Offline ollyjg

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Re: Exhaust Emissions Warning Light
« Reply #14 on: 19 April 2013, 14:05 »
Trying to keep this all in one thread  :grin:

So my little code reader came today and threw up these codes for me;

17536
Long term fuel trim system too rich (bank 1)
16518
02 Sensor Circuit - No Activity Detected (Bank 1 Sensor 1)
16555
Fuel Trim - System Lean (Bank 1)

Done a bit of reading around and people say its MAF, 02 sensor or ignition

Recently cleaned my MAF but had the light on before this, and my car has seemed to improved since the MAF clean so I wouldn't of thought it would be that..
So I'm guessing its the Lambda sensor that's causing all this? Any help would be much appreciated :)
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Offline Metallix

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Re: Exhaust Emissions Warning Light
« Reply #15 on: 19 April 2013, 15:04 »
It says non activity on the lambda sensor, which either means its stuck / poisoned / not reading
OR you have fueling that is permanently stuck high or low.

I'd say change the lambda sensor.
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Offline ollyjg

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Re: Exhaust Emissions Warning Light
« Reply #16 on: 19 April 2013, 16:35 »
is changing the sensor something that's easily done? Or does it require the car to go into a garage?
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