Known Issues/P0158/Toyota

P0158 on Toyota

O2 Sensor Circuit High Voltage (Bank 2, Sensor 2)

Minor1 Toyota model affectedSystem: Emissions
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P0158 on Toyota vehicles indicates o2 sensor circuit high voltage (bank 2, sensor 2). Au7o has documented this code across 1 Toyota model — most commonly on Camry. The PCM detects a persistently high voltage from the Bank 2, Sensor 2 downstream O2 sensor, indicating a short to voltage, contamination, or a rich condition at the post-catalyst sensor.

Common Causes of P0158

  • •Faulty Bank 2 downstream O2 sensor
  • •Short to voltage in signal wire
  • •Coolant/contaminant on sensor
  • •Rich exhaust condition
  • •Wiring/connector fault

P0158 on Toyota by Model

Toyota Camry(1 issue)

  • 2007-2010 2GR-FE P0138/P0158/P0606 Diagnostic Gates - T-SB-0001-102007-2010

    Toyota T-SB-0001-10 Rev1 covers specified 2007-2009 Camry VDS BK46K and 2010 VDS BK3EK applications. P0138/P0158 may result from incorrect air-fuel-sensor response, and P0606 may also be present due to incorrect downstream O2-sensor operation. Toyota distinguishes these paths using the complete DTC set, freeze-frame air-fuel/O2 voltage and downstream O2 impedance, followed by circuit inspection. It does not describe every P0606 as a sensor fault or support the original 2AZ-FE, 2006-2012, VSC/TRAC or battery claims.

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Frequently Asked Questions

What does P0158 mean on Toyota?▼

P0158 stands for "O2 Sensor Circuit High Voltage (Bank 2, Sensor 2)." The PCM detects a persistently high voltage from the Bank 2, Sensor 2 downstream O2 sensor, indicating a short to voltage, contamination, or a rich condition at the post-catalyst sensor. On Toyota specifically, this code is documented across 1 model.

What causes P0158 on Toyota vehicles?▼

Common causes on Toyota: Faulty Bank 2 downstream O2 sensor, Short to voltage in signal wire, Coolant/contaminant on sensor, Rich exhaust condition, Wiring/connector fault. Specific causes vary by model and year — see the per-model sections below.

How much does it cost to fix P0158 on a Toyota?▼

Repair costs vary widely depending on the root cause and specific Toyota model.

Which Toyota models have P0158 documented?▼

Au7o has documented P0158 on 1 Toyota model: Camry.

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