LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2014 >> Focus S, Standard Trans, Gas >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) >> DTC Diagnosis >> P2A01 - O2 Circuit Range / Performance Bank 1, Sensor 2
April 5, 2026: LEMON Manuals is launched! Read the announcement.

P2A01 - O2 Circuit Range / Performance Bank 1, Sensor 2

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

Description:  This DTC sets when the heated oxygen sensor bank 1, sensor 2 (HO2S12) voltage is out of range low for a calibrated period of time.
Possible Causes: 
  • Crossed HO2S12 and SIGRTN circuits
  • Corrosion
  • Incorrect connections
  • Contaminated HO2S12
  • Deteriorating HO2S12
  • Damaged HO2S12
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 DW: HEATED OXYGEN SENSOR (HO2S) .