Rick's Free Auto Repair Advice

Posts Tagged: B1S1

P2195 Toyota

Fix code P2195 Toyota This P2195 Toyota is a manufacturer-specific trouble code for Toyota vehicles. It refers to the air-fuel sensor. The air-fuel sensor in Toyota vehicles is a more sophisticated oxygen sensor than you’ll find on other makes. It’s more expensive too, so don’t automatically assume that you can get by with throwing a new one in. The sensor could be telling you the truth and you really do have a lean condition going on. © 2012 Rick Muscoplat

Oxygen Sensor Location

Where is the oxygen sensor Located You’ve got an oxygen sensor code and the description says something like B1S2. What does it mean? What’s the oxygen sensor location? B1 means the sensor is located on the same bank of the engine that has the #1 cylinder. B2 is located on the opposite bank. S1 means the sensor is located BEFORE the catalytic converter S2 means the sensor is located AFTER the catalytic converter Just remember: An oxygen sensor code does NOT automatically mean you have a bad sensor. The sensor … Read More


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