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Rack and Pinion pressure sensor/switch.

 
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Old 11 Nov 2016, 08:54 pm
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Default Rack and Pinion pressure sensor/switch.

I am the original owner of a 2008 Touring N/A with about 54K Miles. (2nd Gen)

The pressure switch recently started leaking power steering fluid from the center of the switch. The switch is not wired to anything, It is capped off with a clear plastic cap. I can see the fluid thru the cap and it drips fluid around the cap and onto the lines and cross member. So far it has only used a few ounces of fluid.

Is the switch is only used on some models or maybe 1st generation to control engine rpm thru the ECM?

The rack and pinion is original and never worked on. If it's not needed, could I Just replace it with a plug/cap or should I Just replace the switch?
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Old 11 Nov 2016, 09:17 pm
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Default Re: Rack and Pinion pressure sensor/switch.

Can you post a picture of what you're referring to? I don't believe my PT has a pressure switch on the rack. The rack has been replaced but it was replaced with an OEM one from a dealership.
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Old 11 Nov 2016, 09:27 pm
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Default Re: Rack and Pinion pressure sensor/switch.

Quote:
Originally Posted by soggydog View Post
I am the original owner of a 2008 Touring N/A with about 54K Miles. (2nd Gen)

The pressure switch recently started leaking power steering fluid from the center of the switch. The switch is not wired to anything, It is capped off with a clear plastic cap. I can see the fluid thru the cap and it drips fluid around the cap and onto the lines and cross member. So far it has only used a few ounces of fluid.

Is the switch is only used on some models or maybe 1st generation to control engine rpm thru the ECM?

The rack and pinion is original and never worked on. If it's not needed, could I Just replace it with a plug/cap or should I Just replace the switch?
That's strange that it has the switch & no wiring...my 2006 doesn't have the switch. You should be throwing the P0551 code if it was hooked up.
It would be cheaper to cap it off, the switch runs about $40 unless you buy it off eBay.
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Old 12 Nov 2016, 04:22 pm
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Default Re: Rack and Pinion pressure sensor/switch.

I should have taken a picture while it was up on stands. can't really see it good from the top. Its up on the neck of the rack, near where the lines from the pump attach, facing the rear of the car.

I checked for codes with a OBDII Cen-tech scan tool. none stored.
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Old 18 Nov 2016, 08:05 pm
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Default Re: Rack and Pinion pressure sensor/switch.

Should this really be plugged? Wouldn't there be some repercussions from this? I've had to replace it once on my car and from reading, it seems leaking ones are common. My understanding is that this valve sends a signal to the ECU when you turn the wheels and puts load on the engine(power steering pump) to up the rpm's a bit.
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Old 18 Nov 2016, 08:13 pm
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Default Re: Rack and Pinion pressure sensor/switch.

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Originally Posted by valiant1966 View Post
Should this really be plugged? Wouldn't there be some repercussions from this? I've had to replace it once on my car and from reading, it seems leaking ones are common. My understanding is that this valve sends a signal to the ECU when you turn the wheels and puts load on the engine(power steering pump) to up the rpm's a bit.

OP posted that it isn't hooked up & there isn't wires or a plug...that it has some kind of cover over the connection.
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Old 18 Nov 2016, 08:58 pm
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Default Re: Rack and Pinion pressure sensor/switch.

Quote:
Originally Posted by valiant1966 View Post
Should this really be plugged? Wouldn't there be some repercussions from this? I've had to replace it once on my car and from reading, it seems leaking ones are common. My understanding is that this valve sends a signal to the ECU when you turn the wheels and puts load on the engine(power steering pump) to up the rpm's a bit.
In theory that's what it does, but not all PT's have them, which is kind of strange because if some do, that means the wiring must be different, and a different steering rack, and those that don't have it, like mine, is also a different rack because there is not even a place, like a plug, where a switch would go.
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Old 18 Nov 2016, 10:22 pm
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Default Re: Rack and Pinion pressure sensor/switch.

what could be the case is you had a power rack replaced once before when your model didn't come with the sensor harness. so the sensor was just put on there as a plug. over time the seal breaks down and so does the switch, which i replaced this week. i would check the all data for your car to make sure if it did come with a harness or not for the switch. do you have any engine codes ?

if op replies to this post i can check the measurement of the fitting and you could get a plug from a supplier with the sizing. be aware, the plug or sensor would be torqued to only 70 in-lb .
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Last edited by _PTGT03; 18 Nov 2016 at 10:26 pm.
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