P0155-O2 Sensor 2/1 Heater Circuit Open: Notes

Fig 1: O2 Sensor Heaters Circuit Schematic

Courtesy of CHRYSLER LLC

1. When Monitored  : Engine Running and Heater duty cycle greater than 0%.
2. Set Condition  : O2 Heater Temperature does not reach 575°C (959°F) within 90 seconds during monitoring conditions. Two Trip Fault.

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