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. Typical repair costs on Toyota range from $150 to $350, depending on the specific model and root cause.
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)
- Upstream Air/Fuel Ratio (A/F) Sensor Failure — Heater Circuit Fault and Lean/Rich Codes2007-2017
Toyota's upstream wide-band Air/Fuel Ratio (A/F) sensor (Bank 1, Sensor 1, mounted before the catalytic converter — Toyota's name for the front O2 sensor) is a well-known wear item on the Camry. The internal heater element or sensing cell degrades, setting heater-circuit and lean/rich codes, illuminating the check engine light, and causing rough idle, hesitation, and reduced fuel economy. It is a frequent FAIL item at emissions testing.
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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 on Toyota range from $150 to $350, depending on the specific model and root cause.
Which Toyota models have P2195 documented?▼
Au7o has documented P2195 on 1 Toyota model: Camry.