p0551 power steering switch...

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rseldner
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p0551 power steering switch...

Post by rseldner » Fri Aug 13, 2010 9:41 pm

hey guys..got a p0551 code today. is this the part i need to replace? also...how quickly do i need to get this replaced? I'm not experiencing any issues yet.

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ZeroChad
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Post by ZeroChad » Fri Aug 13, 2010 11:07 pm

It allows the ecu to know when the power steering is drawing a heavy load so that it can increase the idle rpm so the car doesn't stall when you're parkings and stuff. Not a huge priority, but convenient.

I believe that's the guy.
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zhneon
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Post by zhneon » Fri Aug 13, 2010 11:53 pm

Yep I have had this code on and off for maybe a year now.
Zero chad is absolutely right, but honestly I have never had problems with this cel even when parking and using the steering. Ehh I'll get around to it eventually...
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esfan
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Post by esfan » Tue Aug 24, 2010 12:44 am

Yes this is the part.

How-to by BRR: viewtopic.php?t=23635

It is located at a place which is pretty hard to reach. I have replaced that not long ago and you have to prepare power steering fluid. However it's a pretty good chance to flush the whole power steering system though.

I have P0551 code for one year before replace the thing and never have a problem except CA smog.
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Post by Silver-Shadow » Mon Jan 20, 2014 8:05 pm

I just did this DIY today. It was fairly easy to get to the part with both front sides of the car jakcked up. The part is right behind the front wheel just above the crossbeam.
I unscrewed the part and ps fluid came pouring out. I was able to get the new one in before I was soaked. I needed to pass CA smog so this was a pita.
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Post by occasional demons » Mon Jan 20, 2014 11:08 pm

I would have jumper'ed the connector, and got to it when it was convenient. (If I lived in So Cal, probably never :lol: )

You got to love the non emissions related stuff they tied into the CEL.

Things like the A/C clutch relay, and the PS switch should have had a separate system. Neither pose a danger, or an emissions issue, but if you have to be tested, they can make life difficult.

Or the EPA could be decent about it, and still pass a car, since it isn't emissions related.

DCX even eliminated the PS switch on ATX neons in 2004. I have a 2004 rack in my '01, and have absolutely no issues. I just plugged the switch into the connector to keep the CEL light off.
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whynot
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Post by whynot » Tue Jan 21, 2014 12:33 pm

I just did this, that is the part, took about 45 minutes to jack the car, change it and refill the fluid. Then took 2 days of driving before the light stayed off. Now it has been off for over a month. No hurry as previously said.

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Post by jonnymopar » Thu Jan 23, 2014 9:24 pm

I had to do this a couple of months ago. With a long socket extension, it was a piece of cake to do.
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Post by whynot » Wed Jan 29, 2014 12:10 pm

ok, So my code came back. only about a month later. Where do I go from changing the switch, that is already complete, as well as a fluid change at that time.

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Post by sidepipe87 » Tue Sep 16, 2014 2:02 pm

occasional demons wrote: DCX even eliminated the PS switch on ATX neons in 2004. I have a 2004 rack in my '01, and have absolutely no issues. I just plugged the switch into the connector to keep the CEL light off.
bringing this back from the dead! Bill - I ran into this issue with my '05 which I MTX swapped and I'm running an '03 R/T PCM. I found out after the fact they eliminated the switch from ATX cars after 03, but now my 03 PCM is looking for it and the rack doesn't have one. I plugged one in from the spare SRT rack I have, which I believe to be the same part number, and still have the code. I find it hard to believe the switch was bad on the SRT but it's possible I guess. Does the switch need to be depressed or something so it senses "pressure"?
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Post by occasional demons » Tue Sep 16, 2014 2:51 pm

It should be normally closed. Pressure opens the switch. Basically like a high pressure version of the engine oil pressure switch.

You could try jumping the connector with a paper clip and see if the code goes away. I don't believe the PCM needs to be reset to get rid of that one.

Was the connector sealed, or just tied off from the factory? if not sealed with a plug, it might be corroded, and not making the circuit. At that point, you may as well cut it off and solder the wires together.
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Post by sidepipe87 » Tue Sep 16, 2014 3:13 pm

There was no connector there at all since it's an 05. They changed the wiring. I put an 05 MTX engine bay harness in when I did the swap so the connector was there. I'll try jumping the connector. I suppose I can try clearing the code too. I just assumed after enough good trips it would've cleared by now.
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Post by occasional demons » Tue Sep 16, 2014 3:20 pm

I know when I was getting it on the '01 before I swapped racks, the CEL would clear on it's own. I don't recall now if the code did.

I just remember the CEL randomly setting. I think it cleared after stopping at destination, and restarting the engine.

I eventually just bought a sensor to be rid of it.
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