OBD Operation Summary for Fiesta - MotorCraftService.com

HO2S Heater Monitor Operation:DTCs Sensor 1 P0030 O2 Heater Control Circuit, Bank 1, Sensor 1P0031 O2 Heater Control Circuit Low, Bank 1, Sensor 1P0032 O2 Heater Control Circuit High, Bank 1, Sensor 1P0053 O2 Heater Resistance, Bank 1, Sensor 1Monitor execution once per driving cycle for heater current, continuous for voltage monitoringMonitor Sequence NoneSensors OKHO2S, HO2S heater, MAFMonitoring Duration 400 ms for heater voltage check, 20 sec for heater current checkTypical HO2S heater monitor entry conditions:Entry condition Minimum MaximumBattery voltage 11 V 16 VO2 heater pulsewidth 5.07 % 99.6 %Modeled Exhaust gas temp at upstream sensor (P0032 only) 200 °CO2 heater pulsewidth (P0053 only) 1.18 % 99.6 %Minimum required cooling energy at upstream position (P0053 only) 10000 JMAF (P0053 only) 25 kg/h 65 kg/hO2 heater on time (P0053 only)30 sTypical HO2S heater check malfunction thresholds:P0030Open circuit determined by heater driverP0031Short to ground determined by heater driverP0032Short to battery determined by heater driverP0053Heater resistance: ≥ 500 ohms for 15 of 20 test samplesJ1979 HO2S Heater Mode $06 DataMonitor ID Test ID Description for CAN Units$41 $C1 HO2S11 Heater Resistance Ohms$42 $C2 HO2S21 Heater Resistance OhmsCONTINENTAL REVISED: SEPTEMBER 17, 2010 PAGE 47 OF 111