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Check your o2 15amp fuse under your hood in the fuse box first to see if it is blown. Then do this. The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The Engine Control Module (ECM) monitors how long it take the sensor to warm up and start sending an adequate signal. The code means the the sensor is taking too long to warm up. Replacing the Front Heated Oxygen Sensor (H2OS) Bank 2 usually takes care of the problem.
 
Replace the sensor. It's on the drivers side in front of the cat. It will cost you about 75 at dealer. Or get a NTK at auto parts store.

My same sensor failed and when I removed the old sensor the wires were all twisted comming out of the sensor. Kind of like the factory installer person plugged in the connector and then threaded the O2 sensor into the pipe.
 
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