TSB-0074-08 - 5/27/08 - MIL ON DTC P2195, P0138, P0171, or P0031

[njerald]

2007- 2008 Camry, 2AZ engine

Some 2007-2008 Camrys with 2AZ-FE engines may exhibit a MIL On condition:

P2195
P0138
P0171
P0031

Replace A/F sensors.

In effect for 36 months or 36,000 miles............

[leosv]

is the Air/Fuel sensor the same thing as the O2 sensor?

[Redline_Me]

^ Nope. Thanx njerald.

[workerant]

Glade I didn't get any of this error code b/c my 36K is gone.

Thanks.

[leosv]

How do you know it isn't the O2 Sensor when you get a P2195 code?

[leosv]

Originally Posted by Redline_Me

^ Nope. Thanx njerald.

This is what is confusing me then..

here is "T-SB-0114-08" Why is (A/F) right in the middle of Oxygen and Sensor? This tells me that the O2 sensor is also called the A/F sensor.

June 20, 2008
M.I.L "ON" DTC P2195, P2197, P0138, P0158, P0171,
P0174, P0031, or P0051

Some 2005 - 2007 model year Avalon and 2007 - 2008 model year Camry vehicles with 2GR-FE engines may exhibit a M.I.L. "ON" condition with one or more of the following DTCs:

^ P2195 - Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1)
^ P2197 - Oxygen (A/F) Sensor Signal Stuck Lean (Bank 2 Sensor 1)
^ P0138 - Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
^ P0158 - Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2)
^ P0171 - System Too Lean (Bank 1)
^ P0174 - System Too Lean (Bank 2)
^ P0031 - Oxygen (A/F) Sensor Heater Control Low (Bank 1 Sensor 1)
^ P0051 - Oxygen (A/F) Sensor Heater Control Circuit High (Bank 2 Sensor 1)

[MJZ]

The A/F sensor is a type of O2 sensor. I'm not sure about this generation of Camrys but there are usually a couple of O2 sensors in the car, at least one being an A/F sensor.