[hndymn]

The Check Engine Light came on. Autozone read it as a P2197, Bank 2, Sensor 1, Stuck Lean. The Service Writer at the dealership said it's the "fuel/air ratio sensor" and they will replace it under warranty tomorrow. There's a slight rotten egg smell from the exhaust sometimes, and the engine runs a bit rough at idle.

It's been lit since Thursday, 4/5. "Stuck Lean" -- is that a problem for the cat. or injectors, or ___?

I couldn't find the P2197 code in any of Lon's Garage code listings, and I haven't seen any posts on the 02 sensor going bad on a 2006. Milage is only 13,600.

What would cause a sensor to crap out so soon? I read that these things sometimes die in pairs.

 

[TS Support]

P2197 Oxygen (A/F) Sensor Signal Stuck Lean (Bank 2 Sensor 1)

Trouble area
1. Open or short in A/F sensor (bank 2 sensor 1) circuit
2. A/F sensor (bank 2 sensor 1)
3. A/F sensor heater (bank 2 sensor 1)
4. A/F relay
5. A/F sensor heater and relay circuits
6. Air induction system
7. Fuel pressure
8. Fuel injector
9. ECM


EG060-05 M.I.L. ON DTC P0171, P0174, P2195, OR P2197
11/16/2005 - 2005, 2006 model year Toyota Tundra vehicles. Under certain driving conditions, some 2005 and 2006 model year Tundra vehicles may exhibit a M.I.L. “ON” condition with at least one of the following DTCs:
P0171 (System Too Lean [Bank 1])
P0174 (System Too Lean [Bank 2])
P2195 (Oxygen [A/F] Sensor Signal Stuck Lean [Bank 1, Sensor 1])
P2197 (Oxygen [A/F] Sensor Signal Stuck Lean [Bank 2, Sensor 1])
The Air Fuel (A/F) sensor manufacturing process has been improved to correct this condition. The following repair procedures should be used to properly diagnose and repair the affected vehicles

 

[hndymn]

Thank you TS Support!