My 2005 Toyota Sequoia SR5 check engine light is on. The local auto parts store plugged in their OBD code reader found code P0136. The onboard diagnostic (OBD) code P0136 is defined as an Oxygen Sensor Circuit Low Voltage in Bank 1, Sensor 2. Low voltage. Ok they say good chance the O2 sensor needs to be replaced, so I replaced the sensor, pretty easy, $65. The old sensor I took out looked in pretty good shape. I cleared the code by removing the battery for a few hours.
After 4 or 5 days of driving the light comes back with P0136 again. Dang it!
Caddyman says Common Problems That Trigger the P0130 and P0136 Code:
Ok, that’s great but is there anyway to get a better idea of which of these issues is more likely? Talking to my mechanic and searching the internet I don’t feel anyone knows. Any advice?