2015 S3 - CEL on, Code P2024

[Emericasktr1]

Hey everyone. Ran my gas tank until 15 miles to E yesterday and then filled it up all the way. I never fill it past the first click and when I started the car, the CEL popped on. Tried unscrewing the gas cap and putting it back to see if it would fix, but no luck. Been driving it around and have cleared it but it just comes back on. Car is a APR Stage 2 and is serviced regularly. Anyone have any similar experiences?

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[MikTip]

I noticed if the gas tank gets filled too high...I get this code.

I change the evap purge valve, and checked all the lines...

Also changed the seal on the gas cap

So far...it looks to be the over filling of the gas tank..

[Emericasktr1]

I noticed if the gas tank gets filled too high...I get this code.

I change the evap purge valve, and checked all the lines...

Also changed the seal on the gas cap

So far...it looks to be the over filling of the gas tank..

I'll burn through some gas today and see if it goes away. Hasnt gone down a notch yet. Weird thing is that I stopped filling it when the pump clicked as it should.

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[Emericasktr1]

I'll burn through some gas today and see if it goes away. Hasnt gone down a notch yet. Weird thing is that I stopped filling it when the pump clicked as it should.

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Gas guage went down a dash, CEL is still on. I reset the codes and after the 2nd startup, the CEL was back on.Screenshot_20200404-132345_Carista.jpeg

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[o1turbo30v]

Leak detection pump according to this thread.

https://www.audiworld.com/forums/q5-...codes-2882903/

[MikTip]

Gas guage went down a dash, CEL is still on. I reset the codes and after the 2nd startup, the CEL was back on.Screenshot_20200404-132345_Carista.jpeg

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How does the seal on the gas cap look?

Also if you DIY...the Evap purge valv can be checked with VCDS.

The over filled gas tank theory...possibly allows fuel to get inside the evap components near the tank. So it takes a couple days to clear the fuel from the evap system...depending on which version of evap your Audi has....

[Emericasktr1]

Here's a couple pics of the gas cap seal. Looks good to me20200406_141543.jpeg20200406_141548.jpeg

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[Emericasktr1]

How does the seal on the gas cap look?

Also if you DIY...the Evap purge valv can be checked with VCDS.

The over filled gas tank theory...possibly allows fuel to get inside the evap components near the tank. So it takes a couple days to clear the fuel from the evap system...depending on which version of evap your Audi has....

Posted some pics

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[Emericasktr1]

UPDATE: Have since filled up the tank again, only until it clicks once. Cleared the codes and restarted the car twice, the CEL is still on.

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[bakedcorn]

Could be bunged up charcoal canister....or maybe bad wires.

Need to research the EVAP system and investigate.

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[Emericasktr1]

Could be bunged up charcoal canister....or maybe bad wires.

Need to research the EVAP system and investigate.

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Heard about a wiring harness that's in a bad spot next to the gas tank that could have been damaged by rubbing together. Gonna check it out soon

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[Emericasktr1]

UPDATE. Got underneath the car and found the Evap Temp Circuit. Just as I suspected, wires were rubbing against a line and went through the plastic on some of them. Audi needs to have a service bulletin to fix this, such a dumb thing. Does anybody know a part number for the red wiring harness in this picture?20200412_173049.jpeg20200412_171450.jpeg

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[MikTip]

Nice find!

Where exactly are those wires?

Thanks

[Emericasktr1]

Nice find!

Where exactly are those wires?

Thanks

Passenger side of the vehicle, in front of the rear wheel next to the gas tank! You'll see the red harness and keep following it and you'll find it. Picture attached with the exact location circled! I can also post a video if I figure out how to20200413_152447.jpeg

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[MikTip]

Thank you!

Mine



Thats the control unit for leak detection...side of the gas tank...

[Emericasktr1]

Thank you!

Mine



Thats the control unit for leak detection...side of the gas tank...

Great find! Now to find out how to obtain that harness

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[Emericasktr1]

A better view of the unit and connector. You can see the tube which probably disengaged from its clip falling down to rub against the wires20200413_212224.jpeg

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[MikTip]

If the wires are not worn thru...get some liquid electric tape. Clean then then apply liquid. Reposition line rubbing on them...

[Emericasktr1]

If the wires are not worn thru...get some liquid electric tape. Clean then then apply liquid. Reposition line rubbing on them...

Unfortunately I believe the wires are worn thru and that's what is throwing up the CEL

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[MikTip]

Looking at the pic...they dont appear worn thru...
It looks like when they get wet...short between the four...the blueish color on the red wire...for the oxidizing copper...curious if it blew a fuse?

[Emericasktr1]

Looking at the pic...they dont appear worn thru...
It looks like when they get wet...short between the four...the blueish color on the red wire...for the oxidizing copper...curious if it blew a fuse?

I'll attempt that repair today or on my day off tomorrow then. Any insight on which fuse it may be?

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[MikTip]

I'll attempt that repair today or on my day off tomorrow then. Any insight on which fuse it may be?

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Fuse 20 of fuse holder C.

Under dash next to steering wheel

[Emericasktr1]

Fuse 20 of fuse holder C.

Under dash next to steering wheel

Thank you! Will have to check this out tomorrow and attempt the repair and get back with the results.

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[Emericasktr1]

Repaired the wire. First pic was during the cleaning. Dabbed some liquid electrical tape on and let it dry. Checked the fuse and it looked like this. Unfortunately after clearing the CEL it came back on.20200507_181229.jpeg20200507_191815.jpeg

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[MikTip]

Repaired the wire. First pic was during the cleaning. Dabbed some liquid electrical tape on and let it dry. Checked the fuse and it looked like this. Unfortunately after clearing the CEL it came back on.20200507_181229.jpeg20200507_191815.jpeg

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dam it...

Can you pull the connector off the control unit(1)? See if its got corroded contacts inside and on the unit?

Also it looks like there is tape on the wires near the connector? Previous repair by dealership?

[Emericasktr1]

dam it...

Can you pull the connector off the control unit(1)? See if its got corroded contacts inside and on the unit?

Also it looks like there is tape on the wires near the connector? Previous repair by dealership?

I tried to remove it but it's a super tight space and was afraid of not being able to put it back in. Not sure but it's looking like I'm gonna buy a new connector end and have the wires connected together instead of getting a whole new harness unless I can get Audi to cover it. Seems like something that should be recalled and/or have a service bulletin out for. Snapchat-423228082.jpeg

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[MikTip]

Its an issue on the Golf R too...

[Emericasktr1]

Its an issue on the Golf R too...

Definitely something Audi needs to take care of...

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[Jeffvone]

Hi guys has someone fixed it on their car ? I have the p2024 code popping up too. The red wire on the connector is worn thru , repaired it but the cel came back on after two startups

[MikTip]

mine still gives me fits with the evap...

[Jeffvone]

crap , thanks !

[Emericasktr1]

Hi guys has someone fixed it on their car ? I have the p2024 code popping up too. The red wire on the connector is worn thru , repaired it but the cel came back on after two startups

Ended up taking the car to audi in which they fixed it somehow and it was about $70

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[Jeffvone]

Do you know what they ended up repairing ?

[MikTip]

Mine some how fixed itself with the cooler temps....no DTC stored on it

[morris39]

P02024 code might also be a generic evap system DTC which might clear iself by the periodic auto tank/charcoal filter purge. See Ross-Tech.

[Jeffvone]

Will try that thanks

[Emericasktr1]

Do you know what they ended up repairing ?

Gonna assume it was the same connector I attempted to repair and wanted to replace. I havent looked in that area since

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[Jeffvone]

Thanks

[MikTip]

So now my S3 wont allow gas into the tank and the charcoal canister keeps filling with fuel and the indication system off...Fun!

[Jeffvone]

Finally got the CEL to turn off. Turned out that the red wire wasn't only worn thru , while pulling on the plug the red wire snapped so I redid the wiring and voila gone !