Question about 1999 Dodge Durango
This happened to me when we got our 99 Durango back from collision work. Looked like a light show at Disney. Check the ground wires on the fire wall . There are alot of them and you'll have to really look for them all but your car is doing exactly what mine did. The body shop missed 4 ground wires during the repair and it drove me nuts but once they were all back on it was fine.
Posted on Feb 11, 2015
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Posted on Jan 02, 2017
SOURCE: P0551 code on 2000 Dodge Durango
P0551 Power Steering Pressure Sensor Circuit Range/Performance
There is a switch that senses the pressure of the hydraulic fluid which reflects how hard it is 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 powertrain controller senses that and increase the idle speed accordingly so the engine doesn' 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. Let me know what you learn, please, or have further questions. Hope this helps I know alot of info but should help you please rate thank you
Posted on Feb 12, 2009
It would be easier to have the codes read that may be stored. There are too many things that it could be. You can check that all four tires are the same size and tire pressure. and you can look at the four wheel sensors (at each wheel) for damage, break in wiring, cracked insulation). Good luck.
Posted on Jun 19, 2009
If you backup lights are not working as well, I would say check the fuse for the backup lights, if the fuse is good, see if you are getting power to that fuse. We had this problem and after weeks of searching and changing sensors, we found the backup light fuse was good, but not getting power. Ran a wire from that fuse to the cig. lighter fuse and all woprksf great.
Posted on Jul 10, 2009
needs electronic control module for abs or may need the control block for the abs thats what controls the pressure to each wheel
Posted on Jul 15, 2009
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