Question about Cars & Trucks
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Posted on Mar 27, 2014
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Posted on Jan 02, 2017
hello sounds like a bad or loose wire on your brake switch up under your dash follow your brake pedal upward push down on your pedal now watch as you let it go slowley where it touches the skinny flat area of your petal touches a switch about 10 inches up from the bottom you should see a button sticking thru a bracket were your pedal touches check and jiggle wire if no lights change switch goodluck
Posted on Sep 18, 2008
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
1st try and search for a vaccum leak, due to the fact that these vehicles have had some bad problems with the length of wires and hoses, if there is a vaccum leak in the vehicle somewhere that will trigger other malfunctions in your vehicle. Using a can of starting fluid or Brake cleaner spray lightly spray around our engine til you hear the motor rev-up and the spot you have sprayed will determine where your vaccum leak will be. And then check under your distributor cap for any moisture be sure to take a rag and wipe and residue off. Also check the firing order on your distributor.
Posted on Oct 28, 2009
A Mechanic told me my switch was broken, but the switch was working fine, the lights just stopped flashing. After some research and consulting with a male friend who knows more about this than I, we discovered it was only the turn signal flasher -- a $16.00 part. On the 2000 model, it's located under the dash, on a separate fuse panel I didn't even know was there. It's to the left of the steering column and right behind the main fuse box, but you can only get to it by going up under the dash. The green one is a little hard to get to, but that's the one for the hazard lights. Its easy to see with a good shop light. It's 1" by 1" ish. The turn signal flasher is below the green one. It's black and a little smaller, and much easier to get to. You simply unplug it and plug the new one in. Voila! There are other fuses on this panel -- I'm not sure what they go to, but I intend to find out so I don't waste money replacing parts I don't need to.
Posted on Jan 20, 2010
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