P2197 on 2007-2010 Toyota Camry — O2 Sensor Signal Biased/Stuck Lean (Bank 2, Sensor 1)
1 vehicles · 1 makes
Most Reported On
P2197 is an OBD-II diagnostic trouble code meaning “O2 Sensor Signal Biased/Stuck Lean (Bank 2, Sensor 1).” The PCM detected that the upstream (sensor 1) oxygen/air-fuel sensor on bank 2 is stuck reporting a lean signal and is not responding to mixture changes. The bank 2 sensor signal is biased lean and unresponsive. This code is most commonly reported on 2007-2010 Toyota Camry.
Common Causes
Diagnostic Tools
To diagnose P2197, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
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Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
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Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
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FAQ
What does P2197 mean?
P2197 stands for "O2 Sensor Signal Biased/Stuck Lean (Bank 2, Sensor 1)." The PCM detected that the upstream (sensor 1) oxygen/air-fuel sensor on bank 2 is stuck reporting a lean signal and is not responding to mixture changes. The bank 2 sensor signal is biased lean and unresponsive.
What are the most common causes of P2197?
The most common causes of P2197 are: Failed/aged upstream O2 (A/F) sensor bank 2, Exhaust leak near bank 2 sensor, Actual lean condition (vacuum leak, low fuel pressure), Contaminated sensor, Sensor wiring/connector fault. The specific cause varies by vehicle.
How much does it cost to fix P2197?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P2197?
Au7o has documented P2197 across 1 vehicle models from 1 manufacturers: Toyota.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.