DTC B2700 Lincoln

Description

Engine started, battery voltage must be at least 11.5v, all electrical components must be off, the ground between the engine and the chassis must be well connected, the exhaust system must be properly sealed between the catalytic converter and the cylinder head, the coolant temperature must be 80 degrees Celsius, and the oxygen sensor heater for oxygen sensor before the catalytic converter must be properly functioning. The DME detected the HO2S signal was in a negative voltage range referred to as character shift downward. This code sets when the HO2S signal remains in a low state. In effect, it does not switch properly in the closed loop operation. The HO2S (before the three-way catalytic converter) has a short circuit to ground that has lasted longer than 200 seconds.