Question about 2009 Buick Enclave

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I have a code P0221,2009 Enclave looking for a good place to start.

I recently had the power steering pump replaced? Maybe a loose connector?

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Code p0221 refers to throttle position sensorB/accelerator pedal position (APP) sensor B--range /performance problem====causes accelerator cable adjustment ( broken)--TP/APP sensor
It also refers tp throttle position switch B/ accelerator pedal position (APP) switch B-range/ performance problem===same cause as before.

Posted on Dec 10, 2014

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Posted on Jan 02, 2017

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Locate the power steering pump and hoses on your vehicle. The power steering pump is located at the front of your engine, near the top of the motor. It will have a black fill cap on it that is labeled "power steering fluid."
1)Clean the outside of the pressurized power steering pump hoses and the power steering pump with clean shop rags to remove any oil deposits. Check the exterior of the lines to identify any signs of steering fluid leakage.
2)Start the motor and turn your steering wheel back and forth several times to cause the pressure in the steering pump to build up. Turn the engine off and recheck the hoses for fluid leaks. Examine the power steering pump for any signs of cracks or damage. If your power steering pump is damaged you need to replace it with a new pump by removing the bolts that hold the pump onto the bracket, taking the pump belt off the pulley and disconnecting the hoses. Replace the power steering pump by reattaching the hoses with a screw clamp and attaching the pump to the bracket. Place the belt around the pump pulley and apply pressure by pulling back on the pump and tightening the belt by using a socket wrench to tighten the bolt on the bracket. You can find a power steering pump for your vehicle at your local automotive.
3)Check the fittings and clamps for any signs of wear or leakage and tighten any loose clamps with a screwdriver. Inspect the hose leading from the power steering pump back into the firewall that leads to the steering wheel. If you find that a leak has developed in the power steering hose that leads to the steering column, consult a mechanic or take your vehicle to a local service center and have an inspection done.
4)Remove damaged power steering hoses by taking the cap off of the power steering pump and then unscrewing the clamp on the hose. Recover draining power steering fluid by placing a clean container below the hose or power steering pump when you loosen the hoses and allow the fluid to drain into the container.
5)Repair power steering hoses where the damaged area is close to the end of the hose by trimming off the affected area with a utility or sharp knife and reattaching the hose with a screw clamp by tightening the clamp with a screwdriver. For damage that is in the middle of the hose or near a section that can't be repaired, replace the hose with a power steering hose that can be purchased from any automotive supply store in your area or online at an automotive supply website, such as the ones listed below in the resources section, and connect the new hose to the power steering pump with a screw clamp.
6)Fill the power steering pump to the proper level with power steering fluid and replace the cap. Start the vehicle motor to test the system. Once you have verified that the power steering system is working properly, shut off the engine.
This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya

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1 Answer

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I have researched this issue and it seems the problem may be the power steering pump, it seems it causes these kinds of loose of power assist and the resulting stiff/hard steering effort, the 1st thing to do is have the fluid checked in the pump, is it full? does it look discolored? if it is low you have a leak, if it is discolored or smells burnt then you may have steering rack issues as well, on occasion a flush of the fluid will help, many shops will flush the power steering for you at a reasonable cost compared to parts like the steering rack and pinion and the steering pump.

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