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 4-131
Diagnostic Trouble Code (DTC) Charts and Descriptions
P2229 - Barometric Pressure Sensor A Circuit High (Continued) For All Others
Description: This DTC sets when the barometric pressure (BARO) reading is abnormally high indicating an extreme low
altitude.
Possible Causes: • Damaged BARO sensor
Diagnostic Aids: When the BARO signal is greater than a calibrated threshold for greater than 100 ms, a concern is indicated.
This DTC is only operational between 1,000 feet below sea level to 15,000 feet above sea level, it should be disregarded if set outside the operational range.
Application Key On Engine Off Key On Engine Running Continuous Memory
Fiesta Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
KA Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
All others GO to Pinpoint Test DO.
P2230 - Barometric Pressure Sensor A Circuit Intermittent/Erratic
Description: This DTC sets when the BARO reading is intermittently above the maximum value or intermittently below the
minimum value for a calibrated number of times.
Possible Causes: • Damaged BARO sensor
Diagnostic Aids: When the BARO signal is greater than or less than a calibrated threshold for greater than 100 ms, a concern is
indicated. This DTC is only operational between 1,000 feet below sea level to 15,000 feet above sea level, it should be disregarded if set outside the operational range.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DO.
P2237 - O2 Sensor Positive Current Control Circuit Open - Bank 1, Sensor 1
Description: This DTC sets when a concern is detected with the circuit used to determine the oxygen content in the exhaust
gas.
Possible Causes: • UO2SPC11 circuit open
• Damaged universal heated oxygen sensor bank 1, sensor 1 (HO2S11)
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DZ.
P2240 - O2 Sensor Positive Current Control Circuit Open - Bank 2, Sensor 1
Description: This DTC sets when a concern is detected with the circuit used to determine the oxygen content in the exhaust
gas.
Possible Causes: • UO2SPC21 circuit open
• Damaged universal heated oxygen sensor bank 2, sensor 1 (HO2S21)
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DZ.
P2243 - O2 Sensor Reference Voltage Circuit Open - Bank 1, Sensor 1
Description: This DTC sets when a concern is detected with the circuit used to determine the oxygen content in the exhaust
gas.
Possible Causes: • UO2S11 circuit open
• Damaged universal heated oxygen sensor bank 1, sensor 1 (HO2S11)
Diagnostic Aids:
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.