It also smelled like something may have over heated

SOURCE: i have an chevy hhr

THIS HAS ELECTRIC POWER STEERING you are having a problem with the steering motor need to take in for service there have been some issues with these might get covered under warranty

SOURCE: Not getting fuel

REPLACE YOUR FUEL FILTER

SOURCE: where do you put the power steering fluid in a chevy hhr 2006 model

the power steering fluid resevoir is located on the passenger side of the engine compartment near the fire wall. mostimes in order to fill it you have to remove the altenator to remove the fill cap to add the fluid.

SOURCE: Power steering failures on a 2007 chevy hhr while

This is a known problem with the power steering which will probably require replacement of the power steering motor. The HHR uses an electric 12V DC motor to provide the power steering force, and they have started failing.

GM is recalling the Cobalt and other vehicles for this issue, but not yet the HHR. If you are out of warranty, you will probably be personally responsible for the cost of diagnostics and replacement.

You will probably need to contact your dealer unless you are able to replace the motor yourself. Sorry.

SOURCE: This code keeps coming up

This could be due to the wrong O2 sensor, Bad Catalytic Convertor, EGR valve or something along those lines. Did you replace this with an OEM part and not have to change the wiring harness or did you have to change the wirings? The other most common issue is you changed it with a non-OEM product and the O2 sensor is not reading correctly. Check to make sure wires are hooked up correctly. Also not know the details of this vehicle it can be that you changed the wrong O2 sensor also, most vehicles have an O2 sensor before and after the Catalytic Convertor