DTC C0186 Hummer
HO2S Signal Biased Lean Bank 2 Sensor 1
HO2S Signal Biased Lean Bank 2 Sensor 1
Description
The engine is operating. The HO2S 1 and HO2S 2 are at operating temperature. The engine is running in closed loop. DTCs P2195 and P2197 run continuously once the above conditions are met.
Cause and Solution
The ECM detects that an HO2S 1 is operating too lean while the corresponding HO2S 2 is operating too rich and the ECM detects that the fuel trim is at maximum control.ORThe ECM detects that an HO2S 2 is operating too rich while the ECM is commanding a lean air fuel mixture.
Video Guide
Diagnostic Info
- DTC Code: C0186
- Brand: Hummer