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The P1135 is a fairly straight forward, and common problem on Toyota vehicles. This code is pointing to a fault in the internal heater for the A/F Sensor (aka Oxygen Sensor) for Bank1 Sensor1. The on-board computer uses this internal heater to get the sensro to normal operating temps in a matter of seconds on cold starts. Most commonly, the sensor will need to be replaced. This sensor being faulty is not actually vehicle-threatening, and more than likely, you will not even notice any drivability or performance issues. However,. the inputs by this sensor are used to calculate air and fuel mixture, so you may see a decrease in fuel economy. The sensor sells for around $233 and the labor time guide calls for under an hour to complete the repair. Labor rates vary from shop to shop, so what you pay for labor will effect the botXXXXX XXXXXne. For a job of this type, a "fair" labor rate can by anywhere from $85-$125 per hour. Shop around, and find a reputable shop that warranty their parts and labor. It's not actually necssary for a Dealer to make this repair, as it is extremely common, and any local shop can handle this without a problem.