Golf/GTI VI :: 2012 - All Dash Warning Lights On After Battery Disconnect / Discharge


Sep 5, 2014

I replaced a post-cat O2 sensor because of a code that came up last week. We didn't reset the ECU, but after driving it a couple days the check engine light went out. 3-4 days of driving and everything looked good.

Today the check engine light came on again and autozone read the code as:

P0136 - heated oxygen sensor - bank 1 sensor 2 (HO2S12) sensor range/performance condition

Explanation Open circuit or short circuit condition

Probable Cause

Poor electrical connection

check other service codes

Faulty Bank 1 Sensor 2.

Anyway, I thought it might be because we didn't reset ECU and some kind of calibration might be off in the system. So, I unplugged the battery in an attempt to let it discharge and reset ECU. When I connected the battery back up.... ALL THE FREAKIN LIGHTS ARE NOW ON THE DASH. Check engine... traction control.... tire pressure.... everything.

Golf TDI 2012

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