Buick Rendezvous Repair Questions

I have a 2004 Buick Rainier am needing help on what's wrong. It starts but won't go forward or in reverse?

Question: HAVE 2004 BUICK RENDEZVOUS AND AM HAVING TROUBLE GETTING THE KEY IN AND OUT? I'VE BEEN HAVING A LITTLE LUCK WITH A FINGER NAIL FILE! IS THIS USUALLY A CONTINUING ISSUE? ABOUT HOW MUCH SHOULD IT COST TO FIX?

2005 Buick Rainier

Engine Size : 3.0
Question: getting a loud humming noise from right front wheel when going over 40 curving towards the right. Change tire but didn't help.

2005 Buick Rendezvous
Engine Size : V6
Question : Car won't start in park position all the time, most of the time you have to pull the gear shift forward and wiggle it and then it will start, I actually thought it had to be in Neutral, but I think it will also start when in D also. When it starts, the display area that tells what gear you are in is incorrect.

I have a 06 Rainer. Sunday night everything was fine. Monday morning when we were on our way to the store it would not shift and the speedometer did not work. Help!!

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How Things Work

How Does the Catalytic Converter Work

A 3-way catalytic (TWC) converter is used on most newer cars and trucks in order to control the exhaust emissions of hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx). The catalyst within the converter promotes a chemical reaction which oxidizes the HC and the CO that is present in the exhaust gas. This process will convert the HC and the CO into a water vapor and CO, and will reduce the NOx, converting the NOx into nitrogen.

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Common Engine Codes

Oxygen Sensor Code P0036 and P0056

P0036 - P0056
Heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensor to reach operating temperature.

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