DTC P0138 BMW
HO2S (Bank 1 Sensor 2) Circuit High Input
HO2S (Bank 1 Sensor 2) Circuit High Input
Description
Engine running, battery voltage 11.5, all electrical components off, ground between engine and chassis well connected and the exhaust system must be properly sealed between catalytic converter and the cylinder head. The DME detected the HO2S signal remain
Cause and Solution
HO2S signal shorted to heater power circuit in the positive connector
HO2S signal circuit shorted to ground or to system voltage
Video Guide
Diagnostic Info
- DTC Code: P0138
- Brand: BMW