The p0141 and p0135 codes both indicate that the O2 sensor heater circuit isn't working. If you've replaced the sensor and you're still getting these codes, there is probably a fault in the wiring or more likely a blown fuse. Refer to your owners manual for the fuse location.

Here is what EngineCodes.com says about P0135:

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it take the sensor to warm up and start sending an adequate signal. The code is triggered when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the sensor and connector are OK, replacing the O2 Sensor 1 usually takes care of the problem
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