P1166

DTC P1166 O2 Sensor System Lambda Bank Controller at the Limit (Bank 1)

DESCRIPTION
The Lambda closed-loop control system is included in the engine's control system. The control system regulates the lambda upstream with the HO2S signal. Rich mixtures generate the high concentrations of CO, H2, and HC. Lean mixtures generate the high concentrations of NOX , and free oxygen.

DTC Detecting Condition:

Step 1 - 2:

Step 3 - 6:

Step 7 - 8:

INSPECTION PROCEDURE