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Home >> Ford >> 2011 >> Focus S, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions - DTC P164B Through DTC UXXXX - (Except Diesel & Hybrid) >> DTC P2A01: O2 Circuit Range/Performance Bank 1, Sensor 2

DTC P2A01: O2 Circuit Range/Performance Bank 1, Sensor 2

P2A01 - O2 CIRCUIT RANGE/PERFORMANCE BANK 1, SENSOR 2

Description:  The powertrain control module (PCM) monitors the heated oxygen sensor (HO2S) for an out of range low voltage concern. This DTC sets if the HO2S voltage is out of range low for a calibrated period of time.
Possible Causes: 
  • Crossed HO2S and SIGRTN circuits
  • Contaminated or damaged HO2S
  • Deteriorating HO2S
  • Corrosion
  • Incorrect harness connections
Diagnostic Aids:  Inspect the connectors for signs of damage, water ingress, or corrosion.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST DW .