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Code P0551 on 2000 dodge durango - 2000 Dodge Durango

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  • Dodge Master
  • 1,149 Answers

Hi:
The P0551 code is a Power Steering Switch Failure.

It is not a safety problem, most likely the pressure switch is bad.

Posted on Dec 11, 2009

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Posted on Jan 02, 2017

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SOURCE: P0551 code on 2000 Dodge Durango

This is a common problem on the Durangos. Usually the Power Steering Switch leaks and wicks through to the o2 sensor causing a temporary short, hence your engine light code. The code is telling you that the o2 sensor is faulty.
Inspect carefully under the P/S switch and check all connectors beaneath it for oil seepage. Clean it off with brake cleaner. To reset the code in your computer you will have to disconnect and reconnect the battery terminals. Leave them disconnected for 15 minutes. Then reconnect. Not sure wether or not your brake lights went back off, but if they did not check the master cylinder and be sure it is full of brake fluid. Do this before disconnecting the battery so that if those lights did not go off they should after reconnecting. Good luck!
Please remember to rate this fix.

Posted on Feb 12, 2009

  • 2 Answers

SOURCE: power steering pressure switch Dodge Durango 2001

It's a $10-$15 switch threaded into a power steering pressure hose just below the power steering fluid reservoir on the driver's side of the engine near the front. Look at the reservoir cap, slightly to the right (facing the front of the engine), and down a few inches. Unplug the 2 wire connector, then hold the boss the switch is screwed into with one wrench and turn the switch with another wrench. When it comes loose, plug the opening with a finger so you don't drain all the fluid and quickly screw in the new switch. 5 minute fix, then have someone clear your trouble codes.

Posted on Feb 18, 2010

  • 1 Answer

SOURCE: I have a 2000 dodge durango, I have a code P0320.

I put in a new crank positioning sensor and it fixed my problem. 42.00 dollars from NAPA. took about 2 hours to change it.

Posted on May 02, 2009

SOURCE: please help me i'm going crazy

po 551 is a bad power steering sensor are you sure it is the trans leaking and not the power steering po 700 is the output speed sensor on the trans either one of them is not hard to change you can do it!!!!!

Posted on Nov 22, 2008

Molson02536
  • 3854 Answers

SOURCE: already had power steering fluid flushed. P0551

code P0551

There is a switch that senses the pressure of the hydraulic fluid which reflects how hard It's working (e.g. like when turning at low speed or when stopped). It then opens the switch (which is normally grounded) and a wire to the power train controller senses that and increase the idle speed accordingly so the engine does't falter. Here is an exchange I had earlier with another owner about it.
"The switch is located on the back side of the power steering gear. It is supposed to raise the idle speed when you are turning the wheels at low speeds when the system will require more pressure and thus otherwise drag down the idle. The wire to the switch is dark blue/light green (signal) and a black ground; and the signal wire goes to pin 45 of the powertrain control module. So you might check the connector at the switch and the connection to pin 45 of the controller, from pin 2 of the plug...
All I can add is that if you locate the two high pressure lines that run to the steering gear from the power steering pump you will find the switch right next to where those two lines connect to the gear. It no doubt just screws out and then install the new one. The manual says that you remove the electrical plug, lifting the locking tab carefully. Then it says to use a crowfoot wrench and extension to remove the old one. The steering fluid will run out so be prepared to clean catch it, and be ready to screw in the new one to minimize loss. If you catch the fluid in a clean pan you car reuse it. The torque spec with a crowfoot wrench is 12 foot pounds and you have to be careful not to exceed the limit or you may ruin the fine hydraulic threads on the steering gear and then you have a potentially expensive problem. So if you can't get a crowfoot that fits the sensor (when you buy the replacement you can see what the size it) and don't have an extension and a torque wrench you may want to let the shop do it. Make sure the electrical plug is in place with the locking tab engaging the tab on the switch. Refill the power steering reservoir. Start the engine and then turn the steering wheel from lock to lock several times to bleed the air from the system. Use only Chrysler power steering fluid if you loose some of it."
I doubt it has anything to do with the fluid, unless the code started right after that. If the wire seems OK, then the question is the switch stuck open (measure that) or is the pressure really too high when you are driving at normal speed or not even turning the wheel. That would have to measured with a gauge. Good luck and keep me posted, be glad to know you got your Durango running 100% again. You can buy the Power steering pump control valve at Pep boys.

Posted on Nov 11, 2009

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