P0137-O2 Sensor 2/2 Below Threshold: Notes

Fig 1: Downstream O2 Sensors Circuit Schematic

Courtesy of CHRYSLER LLC

1. When Monitored  : Start and drive vehicle greater than 32 km/h (20 MPH) and less than 89 km/h (55 MPH). Throttle open for a minimum 120 seconds. Coolant Temp greater than 70°C (158°F) and Catalytic Converter Temperature greater than 600°C (1112°F).
2. Set Condition  : The O2 sensor voltage switches only 11 times or less from rich to lean within 20 seconds during monitoring. Two Trip Fault.

For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .