2022 RULES

[JadeB]

I had the Service Engine Soon light come on this week. Scanmaster reads clean and all the values are checking out. When I use the little tool to get the code, I get the blinking lights for Code 42 (Ignition Circuit Open or Grounded).

I'll search the wires on that end, but I'm stumped as to why I'm showing a problem in one place and not the other. Hoping that info helps someone diagnose it a little quicker. Thanks

 

[pacecarta]

code 42 is when the white EST bypass wire is open and thats something that rarely is the wiring , it usually occurs inside the ignition control module and is very common on aftermarket modules like the wells brand

Malfunction Codes Reference

ECM Trouble Codes and Diagnostics for Buick 3.8l SFI Turbo V6

www.gnttype.org

 

[JadeB]

Thanks for the reply. I started pulling things apart and found a wire to the ECM had a splice in it that had come apart.. Reran the wire to make it whole, plugged it back in, runs like a champ now.