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I had a P1135 code then replaced the upstream O2 sensor on this 1999 Toyota Sienna CE. After resetting with an OCD device and driving a mile or so, the OCD gives the P1130 code.

Does this indicate the O2 sensor was not the problem? Do I need to do more troubleshooting to get rid of the P1130 error?

Thanks.

Vehicle: 1999 Toyota Sienna CE 6 Cyl

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Hi there,

Since you don't have the same code, and the code you have now is for the other sensor, it's going to need some diag time to determine the cause. Sometimes replacing the upstream sensor will change the fuel mix, this can cause the rear to show up with a problem. This is because the front O2 sensor was masking the problem with the rear sensor.

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