2005 MY OBD System Operation Summary for Gasoline Engines

Throttle Position Sensor Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0122 (low input), P0123 (high input), P1120 (closed throttle too low)continuousnonenot applicable5 seconds to register a malfunctionTypical TP sensor check malfunction thresholds:Voltage < 0.20 volts or voltage > 4.80 volts or voltage < 0.488MAF Sensor Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP0102 (low input), P0103 (high input)continuousnonenot applicable5 seconds to register a malfunctionTypical MAF sensor check malfunction thresholds:Voltage < 0.244 volts and engine running or voltage > 4.785 volts engine rpm < 4,000 rpmThe MAF and TP sensors are cross-checked to determine whether the sensor readings are rational andappropriate for the current operating conditions. (P1121/P0068)MAF/TP Rationality Check Operation:DTCsMonitor executionMonitor SequenceSensors OKMonitoring DurationP1121 or P0068ContinuousNone3 seconds within test entry conditionsTypical MAF/TP rationality check entry conditions:Entry Condition Minimum MaximumEngine RPM 1000 rpm minimum of 3800 rpmEngine Coolant Temp100 o FTypical MAF/TP rationality check malfunction thresholds:Load > 60% and TP < 2.4 volts or Load < 30% and TP > 2.4 voltsFORD MOTOR COMPANY REVISION DATE: APRIL 28, 2004 PAGE 79 OF 131