P2195 on Toyota
O2 Sensor Signal Biased/Stuck Lean (Bank 1, Sensor 1)
P2195 on Toyota vehicles indicates o2 sensor signal biased/stuck lean (bank 1, sensor 1). Au7o has documented this code across 1 Toyota model — most commonly on Camry. The PCM detected that the upstream (sensor 1) oxygen/air-fuel sensor on bank 1 is stuck reporting a lean signal (consistently low voltage, above ~0.45V never reached) and is not switching/responding as the mixture changes. The sensor signal is biased lean and unresponsive.
Common Causes of P2195
- •Failed/aged upstream O2 (A/F) sensor bank 1
- •Exhaust leak near the sensor introducing air
- •Actual lean condition (vacuum leak, low fuel pressure)
- •Contaminated sensor (silicone/coolant)
- •Sensor wiring/connector fault
P2195 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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View P2195 across all makes →Frequently Asked Questions
What does P2195 mean on Toyota?▼
P2195 stands for "O2 Sensor Signal Biased/Stuck Lean (Bank 1, Sensor 1)." The PCM detected that the upstream (sensor 1) oxygen/air-fuel sensor on bank 1 is stuck reporting a lean signal (consistently low voltage, above ~0.45V never reached) and is not switching/responding as the mixture changes. The sensor signal is biased lean and unresponsive. On Toyota specifically, this code is documented across 1 model.
What causes P2195 on Toyota vehicles?▼
Common causes on Toyota: Failed/aged upstream O2 (A/F) sensor bank 1, Exhaust leak near the sensor introducing air, Actual lean condition (vacuum leak, low fuel pressure), Contaminated sensor (silicone/coolant), Sensor wiring/connector fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2195 on a Toyota?▼
Repair costs vary widely depending on the root cause and specific Toyota model.
Which Toyota models have P2195 documented?▼
Au7o has documented P2195 on 1 Toyota model: Camry.