Question about Nissan Altima

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My crankshaft sensor keeps failing on my 1997 nissan altima. I've replaced it multiple times and it keeps failing as soon as i shut the car off and on. help?

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  • cradlefan200 Sep 30, 2009

    Well i brought it to advanced auto and they ran the diagnostics on the car and it read: blown crankshaft sensor which is causing the car to misfire. The same reading the diagnostics computer at advanced gave me 5 times. So i've replaced it 5 times and every time i replace it i reset the cars comp. and the car runs like a dream. Until i shut the car off. After i shut it off i turn it back on and the car starts misfiring again. I just took it to advanced auto and they ran the diagnostics and it read the same exact thing. Didn't buy the replacement crankshaft this time because i'd rather fix the problem then to be wasting my money on it part that keeps breaking for no apparent reason.

  • cradlefan200 Sep 30, 2009

    So find the wires to the crankshaft sensor, check every ground, check the ac ripple out of the alternator. And what should i be looking for? Should i be looking for loose grounds? Bad wire connections? And should this fix the problem with the crankshaft sensor constantly failing?

  • cradlefan200 Sep 30, 2009

    That really doesn't answer my question. After i find the circuits for CPS what should i be looking for when im following the wires? Should i be looking for bad ground connections? Or loose wires in the circuits?



1 Answer

One question. How many sensors where actually bad, as in ruined? How were the sensors tested or checked out? Have you looked at any other data.?

Posted on Sep 30, 2009

Testimonial: "Well i brought it to advanced auto and they ran the diagnostics on the car and it read: blown crankshaft sensor which is causing the car to misfire. "

  • 1 more comment 
  • Anonymous Sep 30, 2009

    Got it. Now try and get schematic of that circuit and look at where your CPS wires. come from and go to. Do not forget to check EVERY ground on that vehicle. Also look at AC Ripple out of the Alternator.

  • Anonymous Sep 30, 2009

    The computer is looking of something every time you turn it on,or it runs rough

  • Anonymous Sep 30, 2009

    Please do not be upset with me Iam only trying to help.I believe you do not have the electrial knowledge or general auto theory to be able to work on todays hi tech cars. You will be better off taking it to a professional. Everyone on this site is looking to save money and do the work themselves and I respect that. I did just that and what you are doing when I started 46 years ago. Decades of study, training and $50,000 in tools and test equipment.



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1 Answer

What does a code PC300 mean on a NIssan Altima 2003 2.5S

p0300 means multiple misfire detected. did the fuel pressure check good? are you getting ignition fire to the plugs from the coils? the crankshaft sensor is in a difficult spot and the connector can be hard to get on sometimes. double check the connector and also make sure the terminals in the sensor didn't get bent while plugging it in.

Jun 02, 2012 | 2003 Nissan Altima

1 Answer

Replaced camshaft and crankshaft position sensors in my 2005 altima also the o2 seneor car still will not run. error code 335 What else could be the problem?

DTC P0335 - Crankshaft Position Sensor A Circuit Malfunction
The crankshaft position sensor (CKP) measures crankshaft location and relays this information to the PCM (Powertrain Control Module). Depending on the vehicle, the PCM uses this crankshaft position information to time the spark properly or on some systems it is only for misfire detection and does not control spark timing. The CKP sensor is stationary and works in harmony with a reluctor ring (or toothed ring) that is attached to the crankshaft. As this reluctor ring passes in front of the CKP sensor, the magnetic field created by the CKP sensor is interrupted and this creates a square wave voltage signal that the PCM interprets as crankshaft position. If the PCM detects that there are no crankshaft pulses or if it sees a problem with the pulses on the output circuit, P0335 will set.

A P0335 "check engine light" code could be caused by:
Damaged CKP sensor connector
Damaged reluctor ring (missing teeth or not turning due to sheared-off keyway)
Sensor output open
Sensor output shorted to ground
Sensor output shorted to voltage
Failed crank sensor
Broken timing belt
Failed PCM

If you need additional details about test and solutions, just contact us in the Code Link.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer. Thank you for using Fixya, and have a nice day.


Oct 21, 2011 | 2005 Nissan Altima

2 Answers

2005 nissan almera,1.5letre.. fault code po725

P0725 NISSAN - Engine Speed Signal

The P0725 Codes is triggered when TCM does not receive the engine speed signal from ECM.

The Engine Control Module (ECM) monitors the engine speed through the Crankshaft Position (CKP) sensor with the engine running, and send signal to the Transmission Control Module (TCM).

- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes:
- Open or shorted CKP sensor circuit condition
- Poor CKP sensor electrical connection
- Check communication error between the ECM and TCM
- Failed CKP Sensor

Possible solution:
Very common problem with Nissan vehicles, usually replacing the Crankshaft Position sensor takes care of the problem.

Keep us updated.

Feb 12, 2011 | 2005 Nissan Altima

2 Answers

My Nissan Altima 1997 has a Engine Check light on. I brought it to an Autozone for diagnostic. The test result showed that the probable cause is a Crankshaft Sensor (CS). I want to replace it but I don't...

cs sensor is beside crankshaft pulley side of motor look for electrical plug. or could be inside crankshaft pulley, some are made that way, if so you'll have to pull harmonic balancer to get it out. hope i helped!!!

Aug 16, 2010 | 1996 Nissan Altima

1 Answer

Car jerks on freeway and engine shuts off.

It sounds like your Mass Air Flow Sensor is faulty. These sensors will normal show fault when cruising at highway speeds causing the vehicle to almost stall or stall. Replace the Mass Air Flow Sensor with a known good one and test drive the vehicle. This will most likely repair your concern.

Nov 02, 2009 | 2005 Nissan Altima

2 Answers

Crankshaft Position Sensor Error P0335 recurred after r&r

In the kit there are two sensor that look identical. The one for the crankshaft has a white paint mark on it near the bolt hole. Make sure that it is in the right location.

Jul 25, 2009 | 2003 Nissan Altima

1 Answer

Where crank shaft and camshaft?

The camshaft position sensor is located on the timing cover, near the top of the motor. The crankshaft position sensor is located on the same timing cover near the crankshaft. Just a side note, more than likely the crankshaft position is your issue and it's under a recall from Nissan and they will replace it for free.

May 23, 2009 | 2002 Nissan Altima

4 Answers

Crank shaft sensor

I have 10 years experience in a Nissan dealership and I know without a shadow of a doubt that the Crankshaft Position Sensor is NOT located next tp the crank pulley... it is rather at the other end of the engine near where the transmission bellhousing bolts to the engine block. It is on the side toward the firewall near the bottom. Even if you can get the vehicle on a lift and get under it, you can't really see it... It's more of a feel thing... There was a campaign (recall) on these engines to replace Crank Position and also Cam Postion sensors. Check with your dealer- the campaign might be open. You will need your VIN number when you call.

Oct 23, 2008 | 2003 Nissan Altima

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