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Crankshaft sensor location and installation

Tiny
WILLIE ROBISON
  • MEMBER
  • 2015 BUICK REGAL
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
I am not a mechanic. However, I want to install the crankshaft position sensor and fuel pressure regulator myself. I need the location of both parts. Are there any special tools needed and should I unplug the negative battery cable and if so, how long should the cable be unplugged? Will either part need any special programming after their installation or will the on-board computer do it all?

Thanks a million.

Willie
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Saturday, October 3rd, 2020 AT 5:39 PM

16 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I am attaching the info for the crank sensor. There are no special tools needed for these parts and it is always a good idea to unhook the negative cable when doing work on the engine. However, it is not necessary for these repairs.

As for the regulator, that is part of the fuel pump. Is this what you intended or was there another specific part that you had in mind? See the second attachment for this info. Let me know and I am happy to provide the correct info that you need. If that is what you intended, I included that process which does call for a special tool. This is to remove and install the ring for the fuel pump in the tank. These are commonly available so it is not that big of a deal. Thanks
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Saturday, October 3rd, 2020 AT 5:57 PM
Tiny
WILLIE ROBISON
  • MEMBER
  • 5 POSTS
Thanks for the super rapid response. I'm trying to determine where the sensor is based on the graphic you sent. Is it on the driver's side by that round looking bowl with the screw off top? The electrical connection has one yellow wire going to some connector. And, I needed to know where the fuel pressure regulator is located. Please have patient with my minimal automotive experience. I am a flight instructor, but know little about automotive mechanics.
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Saturday, October 3rd, 2020 AT 6:33 PM
Tiny
WILLIE ROBISON
  • MEMBER
  • 5 POSTS
By the way, isn't there suppose to be a purple and yellow wire going the connector of the crankshaft sensor? How late do you answer our questions?
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Saturday, October 3rd, 2020 AT 6:41 PM
Tiny
WILLIE ROBISON
  • MEMBER
  • 5 POSTS
This is specific to my automobile, right?
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Saturday, October 3rd, 2020 AT 6:44 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Sorry for the delay. The crank sensor is behind the starter. I attached a different view and circled the number 6 that points to the sensor.

Also, I attached the wiring diagram that shows the wiring going to the crank sensor.

Lastly the fuel pressure regulator is part of the fuel pump assembly on this vehicle. Is there a reason you need it? If you need to replace it then it comes on a new pump assembly.

Lastly yes, this is all out of the manual for your vehicle that you listed above.
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Sunday, October 4th, 2020 AT 6:00 PM
Tiny
WILLIE ROBISON
  • MEMBER
  • 5 POSTS
I am thankful to the Lord for having found your site. Hey, 2CarPros, thanks for your diligence and research. The reason I was told that I needed a fuel pressure regulator because of the OBD Codes. P0335 for crankshaft sensor and DTC's P0089 and P228D for fuel pressure regulator performance, regulator stuck open, 2200+PSI fuel pressure at Idle, should be 376-700. This information is from Sunrise Chevrolet Dealership, in Collierville, TN, a suburb of Memphis. I used my own OBDII and got the same codes before going to their repair facility for their diagnostic test. So, the regulator is not a separate purchase from the fuel pump? It all comes as a one piece unit? One last concern. When I look at my engine standing in the front the drawing you sent me does not look the same. So, I have to remove the starter to get to the sensor? Thanks, again. When I finally complete this repair I will certainly tell you.
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Monday, October 5th, 2020 AT 9:44 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,878 POSTS
KASEKENNY1 is one of our best! Use 2CarPros anytime, we are here to help. Please tell a friend.
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Monday, October 5th, 2020 AT 9:45 AM
Tiny
19CHEVY
  • MEMBER
  • 2 POSTS
  • 1999 BUICK REGAL
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 205,000 MILES
We had trouble with it starting and changed the crank sensor. And now it is cutting out at high rpm's. What should we look at next?
Bill
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Monday, October 5th, 2020 AT 9:46 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you do any testing before you replaced the crank sensor?
If the problem is a misfire, checking the codes should tell you which cylinder/s. Some of the national brand autostores will check codes for free.

At one point in time there was a recall on your vehicle for faulty coil/s and ignition module. I'm not saying to replace anything, do some testing. I hate to replace anything without doing some testing.

How is the fuel pressure?
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Monday, October 5th, 2020 AT 9:46 AM (Merged)
Tiny
19CHEVY
  • MEMBER
  • 2 POSTS
Fuel pressure is good
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Monday, October 5th, 2020 AT 9:46 AM (Merged)
Tiny
MEINELCAJON
  • MEMBER
  • 1 POST
  • 1998 BUICK REGAL
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 55,000 MILES
It seems to miss or slip. The technician says it is the crank sensor but he doesn't have the tool to adjust the sensor when he installs it. Where can I get one?
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Monday, October 5th, 2020 AT 9:47 AM (Merged)
Tiny
ZACKMAN
  • MECHANIC
  • 4,202 POSTS
The sensor requires a scan tool such as Genysis by OTC (genysisotc. Com) or Verus by SnapOn (www1. Snapon. Com/diagnostic). These scan tools cost quite a bit ($1K upward and more), my opinion is that you are better off calling your local auto shops and find one with a scan tool.
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Monday, October 5th, 2020 AT 9:47 AM (Merged)
Tiny
KRISTI1007
  • MEMBER
  • 1 POST
  • 1991 BUICK REGAL
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
I have a 91 regal 3.1 It wont start and has no spark. Took the control module to be tested and it is good. The fuel pump was replaced not long ago and is working. A friend told me it was probably the crankshaft sensor. Where is that located and how do you replace it?
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Monday, October 5th, 2020 AT 9:47 AM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
LOCATION:
Under hood, passenger side, lower engine area, passenger side of engine block, mounted front of crankshaft pulley.

REMOVAL:
Disconnect sensor harness at IDI or DIS ignition module. Remove bolt and esnsor from engine block. Inspect crankshaft sensor "O" ring for wear, cracks or other damage. Replace as necessary. Lubricate new "O" rings with engine oil before installing.

INSTALLATION:
To install, reverse removal procedure.

Thanks for using 2CarPros. Com!
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Monday, October 5th, 2020 AT 9:47 AM (Merged)
Tiny
WILLIE ROBISON
  • MEMBER
  • 5 POSTS
Someone told me that, that crankshaft position sensor was on the driver side behind the starter on the 2015 Buick Regal 2.4L FWD.
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Monday, October 5th, 2020 AT 7:43 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
That is correct. You need to remove the starter to access it. As for the P0089 that does change things a bit as it is dealing with the high pressure regulator. That is still internal to the pump but not the pump in the tank. This high pressure pump is on the back side of the engine. I included the info and testing that we need to do in order to find the issue.

Let us know what you find or questions you have on this. Thanks
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Tuesday, October 6th, 2020 AT 4:58 PM

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