OK. AutoZone uses a "generic" scan-tool, so the P0440 is more than likely just a by-product of the P0446 (the P0440 is not a valid code on this vehicle, however, it IS on other vehicles, and is very similar to the P0446).
Looks like you have 2 different problems here.
The P1135 is a very straight forward code pointing to a faulty A/F Sensor (very similar to an Oxygen Sensor
, just "smarter" as Toyota uses it's inputs for more functions). This is a very common Toyota fail item. The sensor is located on the side of the engine closest to the windshield, mounted to the exhaust
manifold. Carefully inspect the electrical connector and as far up the harness as you can looking for any loose, broken or damaged wires (very rare, but always good to check!). If the visual inspection checks ok, replacing the A/F Sensor will solve the problem. Keep in mind- it must be an "A/F Sensor" and Oxygen Sensor will not do the job correctly!
The P0446/P0440 is a bit more difficult to diagnose. P0446 is recorded by the ECM when there is an evaporative emissions leak from the components within the EVAP system, or when there is a malfunction in the VSV for EVAP, the VSV for pressure switching valve or in the vapor pressure sensor itself. Best place to start here is to have the EVAP System "smoked". This is where a machine forces smoke through the system, and any leaks will reveal themselves. If the smoke test shows no leaks, then unfortunately, each item listed above will need to be tested. More times than not, it's a faulty VSV, so these should be tested first.
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