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Crankshaft position sensor replacement instructions please?

Tiny
ANONYMOUS
  • MEMBER
  • 2010 NISSAN ALTIMA
  • 140 MILES
I change the engine, after that, I have crank to much to star de engine, some time star fast and some time I have to wait 5 o 10 minute cranking the engine to start. I check the timing, is ok, the cps line to the ecu, ok I, change the ecu and the bcm the same thing, I dont fine any information of this car, I somebody can help me with the wiring diagram, y don, know this car, if you start the engine and disconnect the crank position sensor, the engine continue on, I dont know what else do?
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Monday, February 25th, 2013 AT 12:40 AM

34 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
It sounds like this needs a crank sensor so if it were me, I would go ahead and replace this and retest.

Here are some guides that will help with this:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Below you will find the detail on this sensor.

Let's run through this material and let us know if you have questions. Thanks
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Saturday, February 20th, 2021 AT 12:34 PM
Tiny
KENN1987
  • MEMBER
  • 1 POST
  • 2006 NISSAN ALTIMA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 60,000 MILES
I need to replace the sensor on this car?
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Sunday, February 21st, 2021 AT 6:03 PM (Merged)
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I am attaching the information on how to replace this and its location.

Also, here are some guides that will give more information:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Let us know what questions you have and we can go from there. Thanks
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Sunday, February 21st, 2021 AT 6:03 PM (Merged)
Tiny
VICTORIA PEREZ
  • MEMBER
  • 1 POST
  • 2006 NISSAN ALTIMA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 1,250,000 MILES
I replaced the crank position sensor now the car was having start up issues and shaking. Why would this happen?
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Sunday, February 21st, 2021 AT 6:03 PM (Merged)
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
If this was not doing this prior to replacing the crank sensor then I suspect you either have an issue with this sensor or the air gap is not correct. I attached the way these sensors work. As you can see there is a magnet in the end of the sensor and it picks up the high spots of the tone wheel and that changes the voltage that the sensor is sending to the ECM and this is how it knows the position. With a weak signal the ECM may not start the engine until it figures out the position. If you still have the original sensor, pull this sensor back out and compare them if you have not done that. Just make sure the depth of the sensors are exact.

If they are the same, I would exchange for another one from the store. They should return it with no issues.

Aftermarket sensors are not that great so if you get another one, you may want to get your money back and then buy a sensor from Nissan. They are probably a little more expensive but are better quality.

Let me know what happens and we can go from there. Thanks

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
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Sunday, February 21st, 2021 AT 6:03 PM (Merged)
Tiny
CHUCK113
  • MEMBER
  • 1 POST
  • 2006 NISSAN ALTIMA
  • 200,000 MILES
My sister in law broke down on interstate 10. The local tech wants to charge her $600.00 to change the crank sensor.
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Sunday, February 21st, 2021 AT 6:03 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,787 POSTS
Hi,

The crankshaft position sensor is located on the cylinder block rear housing facing the gear teeth (cogs) of the signal plate at the end of the crankshaft. It detects the fluctuation of the engine revolution. If you look at pic 1 below, it shows what the sensor looks like.

Here is a link that explains how in general one is replaced. Take a look through it and see if it helps.

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

On your vehicle, it really is nothing more than disconnecting the sensor connector, removing the retaining bolt, and gently removing it from the engine block. When you install the new one, place a small amount of motor oil on the o-ring to prevent damage when installing. Also, there are no relearn procedures required.

Let me know if this helps or if you have other questions.

Take care,
Joe

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Sunday, February 21st, 2021 AT 6:03 PM (Merged)
Tiny
ERNEST FUENTES
  • MEMBER
  • 3 POSTS
  • 2006 NISSAN ALTIMA
Where is the camshaft & crankshaft sensor?
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Sunday, February 21st, 2021 AT 6:04 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi ernest fuentes,

Thank you for the donation.

The Camshaft sensor is located at rear of cylinder head. Item # 16 is tha cam sensor.


https://www.2carpros.com/forum/automotive_pictures/192750_CamSensor06Altima25LFig50_1.jpg



The crankshaft sensor is located on right rear of cylinder block, facing the gear teeth ( cogs ) of the signal plate at end of crankshaft, below the starter motor. Item # 3 is the crank Sensor.


https://www.2carpros.com/forum/automotive_pictures/192750_CrankSensor06altima25LFig152_1.jpg

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Sunday, February 21st, 2021 AT 6:04 PM (Merged)
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Hello ernest fuentes

The camshaft sensor is located by the driver side, Below Throttle Body.


https://www.2carpros.com/forum/automotive_pictures/46384_AltimaCrankshaftCamshaftSensorReplacement038_1.jpg



The crankshaft sensor is located is located driver side rear side of engine.


https://www.2carpros.com/forum/automotive_pictures/46384_AltimaCrankshaftCamshaftSensorReplacement039_1.jpg



In the above photos you can see the location of the camshaft sensor on the driver's side of the engine and the crankshaft position sensor is down on the back side of the engine (best seen from under the car & removed from above).
To replace either sensor you will need a 10mm metric bolt and a ratchet wrench. Don't forget the rubber o-ring. You're done!
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Sunday, February 21st, 2021 AT 6:04 PM (Merged)
Tiny
COLLI026
  • MEMBER
  • 2 POSTS
  • 2006 NISSAN ALTIMA
  • 75,000 MILES
My 2006 Altima 2.5L started jerking on the highway at around 65-70 MPH. I ignored it for a few weeks until the service engine soon light came on and became hard to start when the engine was hot. Took it to Advance Auto to have the codes checked out. The codes are P0335 (Crankshaft position sensor) and P0725 (Engine speed sensor). I replaced the crankshaft position sensor but now the car is hard to crank all the time and the codes are still there. I thought the replacement sensor may have been bad so I took it back and got another one and replaced it. Still the same issue. The sensor is the new style with the metal casing, though it is aftermarket. The car seems to run fine but it's hard to start and I can't get the codes to clear. I have searched the internet over to find an answer. It seems like a lot of people are having the same problem but I haven't seen an answer. Any thoughts?
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Sunday, February 21st, 2021 AT 6:04 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,807 POSTS
Hello,

Some aftermarket sensors are made cheaply with an incorrect winding resistance which can make them act strange. I would buy a factory unit and try that. Also if you haven't replaced your spark plugs recently please do that, you would be surprised at what problems old plugs can cause.

https://www.2carpros.com/articles/how-to-change-spark-plugs

Please let me know if you need anything else to get the problem fixed.

Best, Ken

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Sunday, February 21st, 2021 AT 6:04 PM (Merged)
Tiny
ERNEST FUENTES
  • MEMBER
  • 3 POSTS
  • 2006 NISSAN ALTIMA
Crankshaft sensor located?
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Sunday, February 21st, 2021 AT 6:04 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi ernest fuentes,Welcome to 2carpros and TY for the donation.

Camshaft position sensor


https://www.2carpros.com/forum/automotive_pictures/12900_camshaft_7.jpg




https://www.2carpros.com/forum/automotive_pictures/12900_camshaft2_2.jpg



Crankshaft position sensor


https://www.2carpros.com/forum/automotive_pictures/12900_cranks_1.jpg




https://www.2carpros.com/forum/automotive_pictures/12900_cranks2_1.jpg

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Sunday, February 21st, 2021 AT 6:04 PM (Merged)
Tiny
JMCCL13
  • MEMBER
  • 1 POST
  • 2005 NISSAN ALTIMA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 37,000 MILES
SES light came on about 3 months ago. The code given was for the crank shaft positioning sensor. I did not notice any difference in the way it drove. I later drove trough some water (accidentally) and the light went off. It stayed off for 2 months and has just come back on. The dealer is telling me that this is not covered by the warranty. Is this a real problem or can it be ignored.
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Sunday, February 21st, 2021 AT 6:05 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

It should never be ignored. When there is a fault, the light comes on. If you ignore it, you will most likely end up on the side of the road broken down.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works

The sensor is at the back of the motor low on the block. I attached a couple of pictures for you of the location. It is held by a 10mm bolts and a connector.

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Roy
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Sunday, February 21st, 2021 AT 6:05 PM (Merged)
Tiny
CRACKER
  • MEMBER
  • 4 POSTS
  • 2005 NISSAN ALTIMA
  • 4 CYL
Where is the crank shaft sensor located on a 2005 Nissan Altima?
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Sunday, February 21st, 2021 AT 6:06 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Crankshaft Position Sensor (2.5L) (F11)On right rear of cylinder block, below starter motor.
Crankshaft Position Sensor (3.5L) (F11)On lower left rear of cylinder block.
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Sunday, February 21st, 2021 AT 6:06 PM (Merged)
Tiny
WEASLE
  • MEMBER
  • 2 POSTS
  • 2003 NISSAN ALTIMA
Engine Performance problem
2003 Nissan Altima 6 cyl Front Wheel Drive Automatic

where is the Crankshaft position senser located on a 2003 nissan Altima and is it hard to replace do I need any tools for it?
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Sunday, February 21st, 2021 AT 6:07 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
On the lower left rear of cylinder block -Yes you need tools to remove it its not an unplug and plug in deal-see below


https://www.2carpros.com/forum/automotive_pictures/12900_cps_12.jpg

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Sunday, February 21st, 2021 AT 6:07 PM (Merged)

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