[usmclopes]

So, I just changed my spark plugs and ignition coils on a 2017 M2 and now I'm getting the following errors:

1B5202- Supply, terminal 15N_1: Short circuit to ground
12B302 - Oxygen sensor heater after catalytic converter
12B102 - Oxygen sensor heater before catalytic converter

I'm thinking this is either wiring or an issue with the integrated supply module. Does anyone have a wiring diagram that's actually useful to diagnose this or have any tips on what to try here?

[///M TOWN]

Originally Posted by usmclopes

So, I just changed my spark plugs and ignition coils on a 2017 M2 and now I'm getting the following errors:

1B5202- Supply, terminal 15N_1: Short circuit to ground
12B302 - Oxygen sensor heater after catalytic converter
12B102 - Oxygen sensor heater before catalytic converter

I'm thinking this is either wiring or an issue with the integrated supply module. Does anyone have a wiring diagram that's actually useful to diagnose this or have any tips on what to try here?

It sounds like you left a ground wire loose

That's my first thought anyway

Recheck your work