Help Vag fault code 00438

**ghostridersa** · 9th January, 2013, 02:10 PM

Good day members of DK

(Audi A4, 1.8t 2004, RB4) Can some members maybe give some advice on this problem. Connected super vag k + can 2 plus to adjust mileage. Didnt change the mileage but tried, didnt work. But now the fuel reserve light stays on now even thought the tank is almost full and the fuel aguge needle is showing the correct fuel level. Checked fuel sender unit in tank and it is perfect. It is only the reserve light which stays on in the dash. Faunlt code in dash is 00438 - fuel supply sensor 2 G169 (open circuit or connected to plus. Could anyone help with this problem?

Many thanks in advance

**Lidahus** · 9th January, 2013, 02:51 PM

I don't know what's your cluster, but some VAG clusters can be coded for 2 individual fuel supply sensors. Usually only one is connected. Probably you had enabled the second one which of cause isn't connected.

**batandball** · 9th January, 2013, 03:27 PM

Originally Posted by ghostridersa

Good day members of DK

Can some members maybe give some advice on this problem. Connected super vag k + can 2 plus to adjust mileage. Didnt change the mileage but tried, didnt work. But now the fuel reserve light stays on now even thought the tank is almost full and the fuel aguge needle is showing the correct fuel level. Checked fuel sender unit in tank and it is perfect. It is only the reserve light which stays on in the dash. Faunlt code in dash is 00438 - fuel supply sensor 2 G169 (open circuit or connected to plus. Could anyone help with this problem?

Many thanks in advance

use some airbag tape or engine management tape to cover light

**ghostridersa** · 9th January, 2013, 04:05 PM

Hahaha, looking to solve the problem not hide it.

Originally Posted by batandball

use some airbag tape or engine management tape to cover light

**miha99** · 9th January, 2013, 10:11 PM

k+can has changed wrong bytes.

**ghostridersa** · 10th January, 2013, 06:28 AM

Thanks for the info, how would I correct this?

Originally Posted by miha99

k+can has changed wrong bytes.

**d2mike** · 10th January, 2013, 06:35 AM

Post what type of car and the part number of the instrument cluster.

**ghostridersa** · 10th January, 2013, 06:46 AM

@ d2Mike, thanks for your reply. It is a 2004 Audi 1.8t with RB4 cluster. Vehicle is not here now so don't have part number.

Originally Posted by d2mike

Post what type of car and the part number of the instrument cluster.

**d2mike** · 10th January, 2013, 07:02 AM

Ok. Do you have the dump of the dashboard?

**ghostridersa** · 10th January, 2013, 07:23 AM

No I don't have the dash dump. Customer needed the vehicle and is bringing it back to me on the 17th of this month.

Originally Posted by d2mike

Ok. Do you have the dump of the dashboard?

**kams20040** · 10th January, 2013, 07:46 AM

thats the reason why i tell donttouch with the shit chinese tool maybe on golf4 1998 ect...... but after dont try you will have surprise

**d2mike** · 10th January, 2013, 08:36 AM

Alright. So if you have the car again in your workshop, post the dump and the coding of the instrument cluster.

**ghostridersa** · 10th January, 2013, 09:11 AM

Thanks my friend I will do that. Thank you. I have a feeling that the dump is corrupted.

Originally Posted by d2mike

Alright. So if you have the car again in your workshop, post the dump and the coding of the instrument cluster.

**ejne** · 21st January, 2020, 12:16 AM

hello I have same problem with MK5 . car have only one fuel sensor but cluster looking for second one. know anyone where in eeprom I need change it?
I have dump and can post it hereif it is needed cluster is 5N0920870D

**armi** · 21st January, 2020, 07:41 AM

Connect to cluster with VCDS and check codding and adaption channels , may be you can change fuel sensor- one or two sensors activated.

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