Ford > Engine Diagnostics > Airflow

MAF

• MAF High Fail A/D Counts: The upper threshold in A/D counts to indicate a failed MAF meter. 0V = 0 A/D counts, 5V = 1024 A/D counts.
• MAF Low Fail A/D Counts: The lower threshold in A/D counts to indicate a failed MAF meter. 0V = 0 A/D counts, 5V = 1024 A/D counts.
• MAF Fail RPM: Above this RPM threshold the MAF will NOT be considered failed.

MAP

• MAP Intermittent: Master enable/disable for the P0109 DTC calculation
• MAP Test Min: P0109 will be set if the MAP Fail counter exceeds this value

Baro Pressure

• Baro Pressure Max: Maximum allowed learned Barometric Pressure
• Baro Pressure Min: Minimum allowed learned Barometric Pressure

Rich/Lean DTC

• LTFT P0172/P0175 Rich Threshold: P0172/P0175 will be set if the LTFT value is lower than this.
• LTFT P0171/P0174 Lean Threshold: P0171/P0174 will be set if the LTFT value is greater than this

O2 Monitor

• O2 Current Monitor: O2 monitoring tests will be disabled if the O2 Sensor volatage exceeds this value.
• O2 Monitor IAT MAX: Above this IAT, O2 monitoring tests will be disabled
• Baro Pressure Min: O2 monitoring tests will be disabled if the O2 Sensor voltage exceeds this value.