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P0450 CEL after brake fluid flush??

enobiko

Go Kart Newbie
Location
NE Ohio
Car(s)
2017 SE 6 MT
It was time to flush the brake fluid again (RBF 600), using my brother's Motive bleeder. When complete, I had a Check Engine Light. I took it to Advance Auto, they found the code to be P0450, indicating an issue with the evap control. These appear to be in no way related! I also bled the clutch hydraulics this time, which means I had to take out the air cleaner box. I wondered if I had pinched a hose? I re-removed the air box, there aren't any hoses under the air box. I made sure the "secondary air" was reconnected properly. There is another (rubber) hose, but I did not disconnect it. Since both of these hoses connect to the filtered side of the air box, any leak would be to... "atmospheric air"?? That is, they aren't under vacuum or pressure. (Slight vacuum, I know.)
Another thing: in October I took the car into a dealer for the suction jet pump recall. The error showed up a month and a half later, so... I don't know if that is related.
I checked the gas cap (3/4 tank of gas, so the code didn't happen immediately after a fill), and it looks OK. I found that the orange gasket for the gas cap is not too expensive; I might replace that. I asked 3 auto parts stores if they could test the gas cap, they could not. I took it to the local E-check station, but they said they can't test just the gas cap, they had to do the whole thing, and if my car was not due to be tested, they could not test it! (I just now checked, it appears that I can have it done 365 days in advance, so... I'll try a different check station.) If I find a bad cap seal, and correct that, I'd have to take it somewhere to reset the CEL...
I suppose I could take my car to the dealer, and ask them to check to see if there is some problem due to the suction jet pump service. If so, it's on them, but if not... They charge $168 labor to replace the spark plugs ($120 for the plugs, which I paid $47 for from Rock Auto), $131 labor for an oil change... what would they charge me in labor to diagnose a P0450 code? Geez... I'm hoping someone here has a good suggestion. I can't think of anything I did while flushing the brakes that might somehow cause a P0450 code.
 

enobiko

Go Kart Newbie
Location
NE Ohio
Car(s)
2017 SE 6 MT
Minor update: I took the car to a different E-Check and had them run it. They confirmed the P0450 code, but more importantly tested the gas cap. It passed. (You can test up to 365 days before the plate renewal date.)
I'll get my nephew to reset the CEL with his OBD11, and see if the code comes back, or was just a fluke.
 

enobiko

Go Kart Newbie
Location
NE Ohio
Car(s)
2017 SE 6 MT
Minor update 2: after resetting the CEL with OBD11, the light is back on, so it appears I have a leak, or bad part, something's not right. I'm not finding anything to troubleshoot a P0450 error.
 

enobiko

Go Kart Newbie
Location
NE Ohio
Car(s)
2017 SE 6 MT
Update: I took it to a local VW specialist, and they found a broken clip where the suction jet pump recall had been done. So, I'm going to take it back to the dealer that had done that work, as I think the broken part is their responsibility.
I hope nobody else who had the suction jet pump recall has this issue. I didn't find a lot of results for the P0450 error, so I think it's rare.
 
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