Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
Powertrain DTC Charts and Descriptions 4-133
Diagnostic Trouble Code (DTC) Charts and Descriptions
P2271 - O2 Sensor Signal Stuck Rich - Bank 1, Sensor 2 (Continued)
• Crossed HO2S12 wires
• Exhaust leaks
• Contaminated HO2S12
• Damaged HO2S12
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test H.
P2272 - O2 Sensor Signal Stuck Lean - Bank 2, Sensor 2
Description: The heated oxygen sensor bank 2, sensor 2 (HO2S22) is forced rich and lean and monitored by the PCM. This
DTC sets when the PCM does not detect the output of the HO2S22 in a calibrated amount of time.
Possible Causes: • Pinched, shorted, and corroded wiring and pins
• Crossed HO2S22 wires
• Exhaust leaks
• Contaminated HO2S22
• Damaged HO2S22
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test H.
P2273 - O2 Sensor Signal Stuck Rich - Bank 2, Sensor 2
Description: The heated oxygen sensor bank 2, sensor 2 (HO2S22) is forced rich and lean and monitored by the PCM. This
DTC sets when the PCM does not detect the output of the HO2S22 in a calibrated amount of time.
Possible Causes: • Pinched, shorted, and corroded wiring and pins
• Crossed HO2S22 wires
• Exhaust leaks
• Contaminated HO2S22
• Damaged HO2S22
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test H.
P2279 - Intake Air System Leak
Description: This DTC sets when the PCM detects an air leak that exceeds a calibrated limit for greater than 5 seconds. If
the airflow entering the engine exceeds the airflow through the throttle, a leak is detected and this diagnostic fails.
Possible Causes: • Unmetered air leaks between throttle body and intake valves
• Air leaks at the intake manifold
• Positive crankcase ventilation (PCV) system is leaking
Diagnostic Aids: Verify the integrity of the PCV system. Refer to Section 1, Positive Crankcase Ventilation (PCV) System for
system information.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test HG.
P2280 - Air Flow Restriction/Air Leak Between Air Filter And MAF Bank 1
Description: This DTC sets when the PCM detects an air leak that exceeds a calibrated limit for greater than 5 seconds. If
the airflow entering the engine exceeds the airflow through the throttle, a leak is detected and this diagnostic fails.
Possible Causes: • Unmetered air leaks between throttle body and intake valves
• Air leaks at the intake manifold
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.