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Camry CNG Models, Camry Gasoline Models With Calif. Emissions & Camry Solara Calif. Emission Vehicles

  1. A heated Air/Fuel (A/F) sensor is mounted on exhaust manifold. For testing of A/F sensor, see AIR/FUEL (A/F) SENSOR . Another heated oxygen sensor is mounted on exhaust pipe behind catalytic converter. This oxygen sensor is referred to as bank No. 1 sensor No. 2, or rear oxygen sensor.
  2. To test heater resistance on bank No. 1 sensor No. 2, disconnect electrical connector for heated oxygen sensor. Electrical connector is a Dark Gray, 4-pin electrical connector located below passenger-side front seat and carpet, near center console. See Figure.
  3. Using ohmmeter, check resistance between +B and HT terminals on electrical connector. See Figure. Replace heated oxygen sensor if resistance is not 11-16 ohms at 68°F (20°C).
  4. If problem exists in heated oxygen sensor, heater or wiring circuit, a Diagnostic Trouble Code (DTC) may be stored in Engine Control Module (ECM). See SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article for retrieving and servicing of DTCs.
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