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Installed JB4 now getting CEL

DrFunkalupicus

Autocross Champion
Location
Topeka
Car(s)
2016 VW GTI S
I'd drive around with out the JB4 for a while and see if it pops back up.
 

stevelatt

Ready to race!
Location
Vermont, USA
Car(s)
2020 GTI S
I'd drive around with out the JB4 for a while and see if it pops back up.
Yea I am going to fiddle with it and see if I can make it go away. If I can't I will have to remove all of it and if it keeps happening I'll just take it to the dealer.
 

RisingFallens

Autocross Champion
Location
Raleigh
Car(s)
MK7.5 GTI!
I’m almost wondering if your circuit is shorting out over bumps and stuff. I guess the system resets it self every ignition cycle? If that’s the case, give the wires a little push pull at the connectors. There should be a way to test the heater circuit. Maybe check the resistance at the connector..? I’m grasping at straws here haha

edit: it would be great to eliminate the component for the diag tree!
 

TheMechanicDude

Drag Racing Champion
Location
Fl
Car(s)
17 GTI Sport
OBD plug connected right? All pins still in place where it meets the plug? Can we see what type of tap you used? That blue O2 wire is an add on when going from the JB1 to JB4 board.
 

shovelhd

Autocross Champion
Location
Western MA
Before removing everything, I would reseat (unplug-plug) the D connector, or whatever the one at the bottom of the radiator is called. If that one is not tight, all sorts of weird stuff happens.
 

stevelatt

Ready to race!
Location
Vermont, USA
Car(s)
2020 GTI S
So last night I cleared the codes again, drove around for a little bit, and the light stayed off. Turned the car off and back on, still off. Went for a longer drive today with a couple WOT pulls, got home, off and on, no light. Not really sure what happened to fix it since I had cleared the codes several times before and hadn't messed with the plugs again but if it stays off I am happy.
 

shovelhd

Autocross Champion
Location
Western MA
So last night I cleared the codes again, drove around for a little bit, and the light stayed off. Turned the car off and back on, still off. Went for a longer drive today with a couple WOT pulls, got home, off and on, no light. Not really sure what happened to fix it since I had cleared the codes several times before and hadn't messed with the plugs again but if it stays off I am happy.

You paid the ransom to Bernie Sanders?
 

stevelatt

Ready to race!
Location
Vermont, USA
Car(s)
2020 GTI S
You paid the ransom to Bernie Sanders?
I mean I didn’t want to let everyone know I sold out to “big socialism” but I guess you outted me
 
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