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2011 F-150 5.0L V8 Low Oil Pressure Warning

 
Old 04-17-2019, 01:46 PM
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Exclamation 2011 F-150 5.0L V8 Low Oil Pressure Warning

Good morning everyone, thank you for taking the time to read this:

2011 Ford F-150
5.0 V-8
4WD
Appx 130k Miles
2nd Owner

Recently, after travelling on the freeway for about 30 minutes I took an exit and stopped at a red light. At full stop with the transmission in drive, my Low Oil Pressure warning light turned on and sounded an alarm. It blinked on and beeped, the gauge dropped to zero, then immediately shot back up and acted normally again. It continued to do this at each red light I hit. Naturally I pulled over as soon as it was safe and checked for any major leaks, etc. It was about a quart low on oil based on my reading, so I topped it off and went on to my destination, where I parked the vehicle for the remainder of the day. I returned home that evening with no issues.

Since then, I have had this happen on several occasions. Only after running the vehicle 25+ minutes and at a full stop, in drive. I did some research, and spoke to some friends. These are the steps I have taken so far to solve the problem:

Changed the oil pressure sending unit.
Changed the oil filter and put in fresh oil (The oil had been changed at the service center a month prior to it happening the first time, so I did it myself just in case).
Had it hooked up to a code reader to monitor stats - no codes are showing and oil pressure is at operational levels.

Based on what I have read, this is a common problem with the 5.0 in these trucks - and generally the solution is the oil pressure sending unit. I don't like to take my vehicles into shops to diagnose problems, as I've had bad experiences doing so, but I'm at a loss here. Figured I would ask you fine people before I proceed. The only other solution I can think of is to change the wiring for the sending unit, but I would have to find a wiring diagram.

Any advice is greatly appreciated! I would love to find the solution to this problem and have it posted here for others that have struggled with the same issue. Thanks


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Old 04-17-2019, 02:31 PM
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Duplicate posts combined.

Last edited by SPOAT; 04-17-2019 at 02:36 PM.
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Old 04-17-2019, 03:03 PM
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Verify the pressure with a mechanical guage.
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Old 04-17-2019, 04:26 PM
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How about the level switch, C1149? I think you did the pressure switch, C103.

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