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06 E250 5.4 no rpm signal new crank sensor - Cars & Trucks

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Wiring harness problems or a defective PCM

Posted on Jan 03, 2013

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Posted on Jan 02, 2017

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skychief2001
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SOURCE: had a new crank sensor fitted to civic 06 computer showing same fault EML keeps coming on any ideas?

Could also be a problem with the wiring between the sensor and the computer.

Posted on Dec 04, 2012

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I have an 06 Chevy Cobalt SS on my Snap-On scanner it says fuel pump disabled it has something to do with the security system I guess is there any info you can give me on this thanks any pants


If my info is correct, part of your security system is starter motor disable, so, if it cranks good, I would think it is not your security system.
What about intermittent rpm signal, comes from crank sensor? If you lose rpm signal, you also lose spark and fuel injector pulse as well as fuel pump.
As far as the initial fuel prime, doesn't need an rpm signal.
Any applicable trouble codes?

Jul 10, 2017 | Cars & Trucks

1 Answer

My 1999 Buick LaSabre dies after 15 minutes and will not restart til it cools down for 1 or 2 hours?


Have you done any testing? Any applicable trouble codes? How long since a tune-up?
When the vehicle stalls do some testing, if the engine is hot, wear gloves. Use a spark tester, check for spark with engine cranking. If spark everywhere, at least you know that system is ok.
If you lose rpm signal, during cranking, no spark, no fuel injector pulse. I have seen crank sensors that would do that, the rpm signal comes from crank sensor. Your not giving us enough info to determine if it is the crank sensor?

Feb 22, 2017 | Buick Cars & Trucks

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There is no RPM singal when cranking why?


If your looking at the dash, Most gauges don't move till the engine is running. If your looking at a scanner and no RPM's. Most likely it is the crank sensor. Could be the wiring/plug. Worse case is the PCM died.

Dec 11, 2016 | Cars & Trucks

1 Answer

No start no fuel or spark


What about your ignition module? I can't tell if you just replaced coils or ignition module included? Also, before buying anything, check voltage and ground for ignition module. Pink wire is voltage, black wire is ground.

The crank sensor sends ac signal to ignition module, the module converts signal to dc, something the computer can handle, then sends rpm signal to computer.

Dec 16, 2015 | 1999 Chevrolet Cavalier

1 Answer

06 sorento timing


If the timing marks are dead on, the crank isn't going to be 180 off. I had one just like what you're dealing with. I replaced the crank sensor and the problem went away. I verified the signal with my scanner when it didn't want to start and sure enough, no rpm signal.

Jan 29, 2014 | Cars & Trucks

1 Answer

Had a new crank sensor fitted to civic 06 computer showing same fault EML keeps coming on any ideas?


Could also be a problem with the wiring between the sensor and the computer.

Dec 04, 2012 | Cars & Trucks

1 Answer

My 1996 Ciera Oldsmobile through a PO336 code?


Hi there:

DTC P0336 - Crankshaft Position Sensor A Circuit Range/Performance


The crankshaft position sensor (CKP) is usually a two wire sensor: a signal and a ground. The CKP sensor consists of (usually) a permanent magnent sensor that is mounted in front of a reluctor (toothed) wheel mounted to the crankshaft. As the reluctor wheel passes in front of the crank sensor, an A/C signal is produced that varies according to engine speed. The PCM (powertrain control module) uses this A/C signal to interpret engine RPM. Some crank sensors are hall-effect sensors instead of permanent magnent sensors. These are three wire sensors, provided with voltage, ground, and signal. They too have a reluctor wheel with vanes and "windows" that change the voltage signal to the PCM, providing a RPM signal. I will focus on the former, since they are simpler design and more common.



The crankshaft reluctor has a specific number of teeth and the PCM can determine the position of the crankshaft using only this sensor's signature pattern. The PCM uses this sensor to also determine cylinder misfires by measuring the reluctor teeth locations in the CKP sensor signal. In conjunction with the Camshaft position sensor (CMP) the PCM can determine timing of spark and fuel injection. If the PCM senses a loss of CKP sensor signal (RPM signal) even momentarily, P0336 may set.


Symptoms of a P0336 DTC may include:
Intermittent stalling & no start
No start
MIL (Malfunction Indicator Lamp) illumination
Intermittent misfire


Potential causes of a P0336 code include:
Bad crank sensor
Broken reluctor ring (missing teeth, debris lodged in ring)
Reluctor ring dislodged/stripped from it's stationary location
Wiring harness chafing causing short
Wiring open in CKP circuit


Possible Solutions: Crankshaft sensor problems are at times intermittent and the vehicle may start and run for some time until problem occurs. Try to reproduce the complaint. When engine stalls or if the engine will not start and continue to run, then crank engine while observing RPM reading. If there is no RPM reading, check for a signal coming out of the crank sensor. Using a scope is best, but since most DIYers don't have access to one you may be able to use a code reader or the tachometer to check for RPM signal.


Visually check the CKP harness for damage or cracking in the wiring insulation. Repair as necessary. Make sure the wiring isn't mis-routed near high voltage spark plug wires. Check for loose connection or broken lock at the sensor connector. Repair as necessary. Obtain a resistance spec for the Crank sensor. Remove and check it. If it doesn't pass, replace it. If it checks out okay, check the reluctor ring for damage, broken teeth, or debris lodged in the ring. Make sure the reluctor ring isn't dislodged. It should be stationary on the crankshaft. Carefully repair/replace as necessary. Note: some reluctor rings are located in the bell housing of the transmission or behind the front engine cover and cannot be easily accessed.


If the vehicle intermittently stalls and after stalling you have no RPM signal and you have verified the wiring to the CKP sensor is good, then try replacing the sensor. If that doesn't take care of it, and you can't access the reluctor ring, seek help from an automotive professional.


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, have a nice day.

Jun 27, 2012 | 1996 Oldsmobile Cutlass Ciera

1 Answer

2005 nissan altima codes p0725, po335. how to fix


P0335 Crankshaft Position Sensor A Circuit Malfunction P0725 Engine Speed input Circuit Malfunction
  1. Using a scan tool, check if, when engine is running or cranking, that there is an RPM signal.
  2. If there is no RPM reading, then visually inspect the crank sensor and connector for any damage and repair as necessary. If there is no visible damage, and you have access to a scope, you could check the CKP 5 Volt square wave pattern. If you do not, then, obtain a resistance reading of your crank sensor from a repair manualmag-glass_10x10.gif. (There are so many different types of crank sensors that there's no way to put here which resistance reading is correct). Then check the resistance of the CKP sensor by disconnecting the sensor and measuring resistance of the sensor. (It is best to check resistance readings from the PCM connector. This rules out any wiring problems from the start. But it does require some mechanical skill and shouldn't be performed if you\'re not familiar with automobile electrical systems). Is the sensor within resistance specs?
  3. If not, replace the CKP sensor. If so, recheck resistance reading from the PCM connector. Is the reading still okay?
  4. If not, repair open or short in the wiring to the crank sensor and re-check. If the reading is okay, the problem is intermittent or the PCM may be at fault. Try reconnecting and checking for RPM signal again. If there is now an RPM signal, wiggle test the wiring harness to try and induce the fault.

Sep 10, 2011 | 2004 Nissan Altima

1 Answer

I recieved Code 12 from diagnosis


For 83-86 Camry, 87 corolla, 84-87 pickups and 4-runner: Code 12 = knock sensor or circuit (distributor or circuit on Cressida, Supra, and Celica 3S-GE)

87-90 Camry, all other models 88-90: Code 12 = Rpm signal/no NE or G signal to ECU within several seconds after engine is cranked.

All models from 1991 on: Code 12 = Rpm signal No "Ne" signal to the ECM within several seconds after the engine is cranked. No "G" signal to the ECM two times in Succession when engine speed is between 500 rpm and 4000 rpm.

Feb 08, 2011 | Toyota 4Runner Cars & Trucks

1 Answer

What is the rpm sensor


the RPM sensor is the Revolutions Per Minute of the crankshaft sensor. It is also called a Crank Sensor and also a Crank Position Sensor on some applications. However, some RPM signals are often taken from the Camshaft Sensor. Either way, RPM is short for Revolutions Per Minute..

Sep 02, 2010 | 2002 Volkswagen Jetta TDI

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