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 4-121
Diagnostic Trouble Code (DTC) Charts and Descriptions
P2090 - B Camshaft Position Actuator Control Circuit Low Bank 1 (Continued)
• VCT12 circuit short to ground
• VPWR circuit open
• Damaged variable camshaft timing bank 1 solenoid 2 (VCT12)
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test HK.
P2091 - B Camshaft Position Actuator Control Circuit High Bank 1
Description: This DTC sets when high voltage on the VCT12 circuit exceeds a calibrated limit for a calibrated amount of time.
Possible Causes: • VCT12 circuit open
• VCT12 circuit short to voltage
• VPWR circuit open
• Damaged variable camshaft timing bank 1 solenoid 2 (VCT12)
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test HK.
P2096 - Post Catalyst Fuel Trim System Too Lean Bank 1
Description: The PCM monitors the correction value from the heated oxygen sensor bank 1, sensor 2 (HO2S12) as part of
the fore-aft oxygen sensor control routine. This DTC sets when the correction value is greater than a calibrated limit.
Possible Causes: • Corrosion
• Incorrect connections
• Exhaust leaks
• Contaminated universal HO2S11
Diagnostic Aids: Inspect the connectors for signs of damage, water intrusion or corrosion.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DZ.
P2097 - Post Catalyst Fuel Trim System Too Rich Bank 1
Description: The PCM monitors the correction value from the heated oxygen sensor bank 1, sensor 2 (HO2S12) as part of
the fore-aft oxygen sensor control routine. This DTC sets when the correction value is greater than a calibrated limit.
Possible Causes: • Corrosion
• Incorrect connections
• Exhaust leaks
• Contaminated universal HO2S11
Diagnostic Aids: Inspect the connectors for signs of damage, water intrusion or corrosion.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DZ.
P2098 - Post Catalyst Fuel Trim System Too Lean Bank 2
Description: The PCM monitors the correction value from the heated oxygen sensor bank 2, sensor 2 (HO2S22) as part of
the fore-aft oxygen sensor control routine. This DTC sets when the correction value is greater than a calibrated limit.
Possible Causes: • Corrosion
• Incorrect connections
• Exhaust leaks
• Contaminated universal HO2S21
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.