My 2001 Durango shows code P0551 Power steering sensor. The truck runs and handles fine, showing no sign of fluid loss or pump noise. Where is the sensor located so I can check the connection, and possibly replace the sensor?
The sensor is number 2 on the chart. My husband is a mechanic and I can not even get him to work on my truck lol! I had to figure this out myself. I replaced the upper power steering pressure hose on my 01 Durango bc of check engine codes P0171 and P0551 showing when scanned. I have been trying to get it inspected and this is the hold up. Drives fine and all fluids are good. Regular maintenance has been done. My pressure hose was leaking and spraying everything up under the hood. The guys at the shop replaced hose but did not clean pressure sensor, sooooo the engine light came back on before 30 miles. Now I have duumped carb and injector cleaner in my gas and also added octane boost to help blow out any sludge and build up. I also took rubbing alcohol and cleaned both male and female adapter ends to pressure switch due to ps fluid having leaked into the plastic plug of the sensor from when the pressure hose had hole in it. I am hoping by claning contacts on pressure switch and by replacing the upper ps pressure hose and also checking my gas cap that this **** light will now stay off. As I type this I have my pressure sensor wire disconnnected and hanging down so any ps fluid can drain out and I will clean it again. I have also cleane the part that connects to the ps sensor itself (black plastic part sticking out of the part that looks like a silver lugnut) I have also unhooked the hot wire on the battery but left the ground on. Gonna let it sit foar a while and then go clean the wiring end of theps sensor and plug it all back up and drive to see if it clears the codes. I will let you know how it goes, but I think this is going to fix my issue and may help you to fix your if you haven't allready! Thanks and DODGE DURANGOS ****!!! I will never ever own another after reading all the complaints and recalls on Dodge Durangos and Dakotas. i have 4 kids and I be damned if this truck is going to casue my kids harm. I plan to raise hell with the dealer that sold me the truck with the check eng light on in the first place!
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two of the codes are EVAP codes. The cost of the repair could be $20 or it could be up to $1200 dollars or more. It just depends on what they find. It could be as simple as a cracked hose or it could be something a little more sever like a NVLD pump or a charcoal canister.
The P0551 is a power steering switch code, i think.
It's an issue with the pressure sensor in the power-steering lines, it needs replacement, if you're going to do this yourself, make sure you do it quickly and try to catch any fluid that might drain from the line in a clean bowl, that way you can reuse it, after installing the new sensor, refill the power-steering fluid and turn the steering wheel lock to lock 20 times, that should bleed any air from the system.
you need the power steering performance switch. around $30 at autozone. I am not 100% sure of the name. Basically what it does is raise the idle when turning at slow speeds to keep the engine from dying on you.
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.
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
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!!!!!