OBD Operation Summary for Fiesta - MotorCraftService.com

HO2S11 circuit check operation:DTCs P0130 – HO2 circuit open (Bank 1, Sensor 1)Monitor executionMonitor SequenceSensors OKMonitoring DurationP0131 – HO2 circuit low voltage (Bank 1, Sensor 1)P0132 – HO2 circuit high voltage (Bank 1, Sensor 1)ContinuousNoneHO2S (P0131, P0132, P0133, P0134, P2297, P2A00), HO2S heaters (P0030,P0031, P0032), MAF (P0101, P0102, P0103)12.7, 20, or 50 seconds to register a malfunctionTypical HO2S11 circuit check entry conditions:Entry condition Minimum MaximumStuck above lean voltage limit (P0130 only)0.35 voltsStuck below rich voltage limit (P0130 only)0.5 voltsTime stuck (P0130 only)50 secondsClosed loop fuel control (P0131 only)Exhaust gas temp (P0131 only) 799.97 °CMass Air Flow (P0131 only)6 kg/hrTime stuck at low voltage (P0131 only)20 secondsOxygen sensor internal resistance (P0131 only)2 ohmsIntegrated mass air flow after purge solenoid closed (P0131 only) 30 gTime stuck at high voltage (P0132 only)12.7 secondsTypical HO2S11 circuit check malfunction thresholds:P0130O2 sensor resistance ≥ 50000 ohms, voltage stuck between 0.35 and 0.5 voltsP0131O2 sensor resistance < 2 ohms and O2 sensor voltage stuck at < .009 voltsP0132O2 sensor voltage stuck above 1.1voltsCONTINENTAL REVISED: SEPTEMBER 17, 2010 PAGE 39 OF 111