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Oil Pressure Sending Unit Wire

 
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  #1 (permalink)  
Old 05 Sep 2010, 05:43 pm
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Default Oil Pressure Sending Unit Wire

Okay so my oil light came on today, checked oil levels and it was at max (Had an oil change about a month ago). The Oil is Castrol GTX Full Synthetic.

The light was coming on only when the RPMs dropped to 1500 or lower, but would immediately turn back off once it got above 1500. I looked into it (on this forum actually) and this is what I basically have gathered:
  1. It is very likely the Oil Pressure Sending Unit
  2. The Part is cheap but getting to it is a pain
  3. You need a 27mm Socket to Replace
  4. "Easiest" way to access it is from the Bottom of the Car

Okay so I get my car up on ramps get under it and I got the aluminum shielding off that was surrounding the sensor/wire housing. I got the "Red Tab" off the Neon Green Plastic housing but I can't pull the Green housing off to save my life!!! Does anyone have any suggestions for this? I've read that this takes only about 20 minutes to do and I've been going at this for 3 hours now...

I would just call a local Mechanic to do it for me but it's Labor Day weekend and Money is a little tight.
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Old 05 Sep 2010, 05:58 pm
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Default Re: Oil Pressure Sending Unit Wire

I haven't had to replace mine but looking at the photo for a replacement switch on a 2001-2005 (you didn't say what year you had) it looks like the wiring would be like some of the other switches. The red tab was a locking tab and now you have to lift up on a "U" shaped piece to get it over the two pointed pieces. You have to lift up and put back/out at the same time.

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Old 05 Sep 2010, 06:04 pm
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Default Re: Oil Pressure Sending Unit Wire

Quote:
Originally Posted by CREWZIN View Post
I haven't had to replace mine but looking at the photo for a replacement switch on a 2001-2005 (you didn't say what year you had) it looks like the wiring would be like some of the other switches. The red tab was a locking tab and now you have to lift up on a "U" shaped piece to get it over the two pointed pieces. You have to lift up and put back/out at the same time.

Sorry I put it in my sig and thought it'd show up, It's a 2004 Touring Edition 2.4L Turbo. The replacement sensor I purchased looks exactly like that. Can you show me a replacement wire piece? If you want I can try and get a picture of it.
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Old 05 Sep 2010, 06:46 pm
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Default Re: Oil Pressure Sending Unit Wire

Props to you! I took the clue you gave me and I was able to get the housing off!! Turns out I accidentally broke off the "Leverage" tab for that "U". I'll need to buy a replacement wire housing but the "red tab" is still in place so it won't come off so for the time being the new sensor is in place and we are good to go!
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Old 05 Sep 2010, 06:48 pm
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Default Re: Oil Pressure Sending Unit Wire

OK, glad you got it off. Good luck.
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Old 16 Sep 2010, 06:16 pm
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Default Re: Oil Pressure Sending Unit Wire

oil light would come on during sudden stops and hard turns. bought replacement in advance auto. looked online for instructions. its directly across firewall, middle of engine block. diagram of engine block online was accurate except that other parts are in the way. tried to get at it from the bottom. too hard. removed air cleaner and moved PDC to get at it. argghh. lost red tab because it required so much force to take it of it flew of and probably somewhere on engine block. pressed douwn on lever part of switch and was able to wiggle it out after a while. tried open wrench. angle too hard . bought dedicated socket at Carquest $ 10. totally worth it. electric socket fit perfectly, clicked and locked. would not come off unless i pressed down on lever. success.

Last edited by calcuaz; 16 Sep 2010 at 08:40 pm.
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Old 16 Sep 2010, 06:27 pm
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Default Re: Oil Pressure Sending Unit Wire

Quote:
Originally Posted by calcuaz View Post
clicked and locked. would not come of unless i pressed down on lever. success.

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Old 01 Sep 2012, 02:19 pm
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Default Re: Oil Pressure Sending Unit Wire

Hi all, good info here but one thing left out. How do the red locking tabs release? I can get one hand on the plug from the bottom or the top but can't see how to release the red tabs. I've seen mention of sliding them but not sure if it slides toward the wire or the sensor or side to side. Once I get the red tabs released do I use a stubby flat blade screwdriver in the slot on top of the green plug to pry up to release the plug? Should I put pressure down on the screwdriver handle raising the tip to unhook the plug or lift up on the handle pushing the tip down (I think tip up looks right)?
They really could have put it in a little better spot.

Thanks for any help I can get.

Last edited by guidoco; 01 Sep 2012 at 02:40 pm.
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Old 01 Sep 2012, 03:28 pm
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Default Re: Oil Pressure Sending Unit Wire

Side to side.
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Old 01 Sep 2012, 04:17 pm
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Default Re: Oil Pressure Sending Unit Wire

The red tabs are devil's screed.
Pry the thing all the way off, it's simply unnecessary.
There's no way, I'm sure everyone will agree, it going to fall off.
When connectors (Such as a 2.7 V-6) are under a component, Chrysler leaves them off- Assume it's a 'tamper proof,' not to keep connector from coming loose

I used to collect connectors when I made MS harnesses, so if anyone needs one, LMK
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