DTC P0140 BMW
HO2S (Bank 1 Sensor 2) No Activity
HO2S (Bank 1 Sensor 2) No Activity
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 failed
Cause and Solution
HO2S before the three-way catalytic converter is contaminated (due to presence of silicone in fuel); Run the engine for three minutes at 3500rpm as a self-cleaning effect
Leaks present in the exhaust manifold or exhaust pipes
Video Guide
Diagnostic Info
- DTC Code: P0140
- Brand: BMW