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I have a 2002 gmc sonoma 4.3 v6 45000 miles. Turns over but won't start. Changed camshaft position sensor and crankshaft sensor. Can't afford to take to a shop.

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  • Justin Lafon
    Justin Lafon Aug 11, 2015

    Got spark and getting fuel. Got code p0014.

  • Jeff Armer Aug 11, 2015

    The powertrain control module (PCM) supplies a 12-volt reference circuit and a low reference circuit to both the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor. The CKP sensor sends a signal to the PCM with each revolution of the crankshaft. The CMP sensor sends a signal to the PCM with each revolution of the camshaft. This diagnostic trouble code (DTC) monitors the CKP signal and the CMP signal to determine if they are synchronized. If both signals are not observed by the PCM within a narrow period of time, the PCM will determine that an error has occurred and DTC P0016 will set.
    Check for the following items:

    • A loose or missing distributor hold down bolt

    • A loose CMP sensor causing a variance in the sensor signal

    • An incorrectly installed distributor - 1 tooth off in either advance or retard positions

    • A loose distributor rotor on the distributor shaft

    • Excessive free play in the timing chain and gear assembly
    Hope this helps , how many miles on the vehicle ? I'd look for slop in the timing chain !

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  • Expert
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Check for fuel supply and spark to plug could be an ecu problem or broken wire or corrosion

Posted on Aug 11, 2015

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  • GMC Master
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The following information courtesy of obd codes.com P0014 - "B" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1) OBD-II DTC Trouble Code Description "B" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1) What does that mean? A code P0014 refers to the VVT (variable valve timing) or VCT (variable camshaft timing) components and the car's PCM (powertrain control module, also called an ECM). That consists of a few different components but the P0014 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is above a set limit (over-advanced), the engine light will be illluminated and the code will be set. Bank 1 is the side of the engine containing cylinder #1. The "B" camshaft shall be either the "exhaust," "right," or "rear" camshaft. Left/Right and Front/Rear are determined as if viewed from the driver's seating position. Potential Symptoms Most likely a P0014 DTC will result in one of the following: hard starting, poor idle, and/or stalling. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates. Causes A P0014 DTC trouble code may be caused by one or more of the following: Incorrect camshaft timing Wiring problems (harness/wiring) in intake timing control valve control solenoid system Continuous oil flow to VCT piston chamber Failed timing valve control solenoid (stuck open) Possible Solutions This DTC code is a result of a mechanical fault of the VCT unit or related components, so there is no need for electrical diagnosis. Refer to vehicle specific repair manual to perform component tests for the VCT unit. Notes: Dealer techs have advanced tools and the ability to follow detailed troubleshooting steps, including the ability to test components using a scan tool. Other related DTCs: P0010 - P0011 - P0012 - P0020 - P0021 - P0022

Read more at: http://www.obd-codes.com/p0014
Copyright OBD-Codes.com

Posted on Aug 11, 2015

  • Justin Lafon
    Justin Lafon Aug 11, 2015

    Thanks and I've also found this in my search. The way I understood it, and after googling it, pointed me in the direction of replacing the camshaft position sensor. Which I did. Besides that l, I'm not a mechanic, so after reading the article, now I'm not sure what direction to go.

  • john h Aug 11, 2015

    but have you tested and or checked the vct and this usually doesnt cause a no start ---you may have skipped a tooth or have a timing chain problem because if fuel and spark and you changed and rechecked sensors should fire --try spraying starter fluid if start and you have fuel pressure in fuel lines than recheck the sensors you changed and regulator --

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  • GMC Master
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Is it getting gas to the cylinders , is there spark at the spark plugs ! You should check thing's out before replacing parts an hoping it fix's the problem .You need to find out what is missing ,fuel ,ignition or an engine problem ! Cranking No Start Real Time Diagnosis Ford Focus

Posted on Aug 11, 2015

  • Justin Lafon
    Justin Lafon Aug 11, 2015

    Got spark and getting fuel. Got code p0014.

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Posted on Jan 02, 2017

Ronnie Wilson

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SOURCE: Crankshaft Position Sensor and Camshaft Position Sensor

REMOVE OR DISCONNECT

  1. Serpentine belt from the crankshaft pulley.
  2. Raise the vehicle on a hoist.
  3. Right front tire and wheel assembly.
  4. Right inner fender access cover.
  5. Using a 28 mm socket, remove the crankshaft harmonic balancer retaining bolt.
  6. Crankshaft harmonic balancer using tool J 38192 or equivalent.
  7. Sensor electrical connector.
  8. Foreign object deflector.
  9. Sensor and pedestal from block face.
  10. Sensor from pedestal.
INSTALL OR CONNECT:

  1. Loosely install the crankshaft sensor on the pedestal.
  2. Position the sensor with pedestal attached on special Tool J 37089.
  3. Position the special tool on the crankshaft.
  4. Bolts to hold the pedestal to the block face, torque to 20-40 Nm (14-28 lb.ft).
  5. Torque the pedestal pinch bolt to 3-4 Nm (38-40 lb.in).
  6. Remove special tool J 37089.
  7. Place the special tool 37089 on the harmonic balancer and turn. If any vane of the harmonic balancer touches the tool, replace the balancer assembly.
  8. Balancer on the crankshaft.
    • Apply thread sealer (GM 1052080) or equivalent to the threads of the balancer bolt.
  1. Torque the crankshaft bolt to 140 Nm + 56°(104 lb.ft + 56°).
  2. Foreign object deflector.
  3. Electrical connector.
  4. Inner fender shield.
  5. Tire and wheel assembly, torque to 140 Nm (104 lb.ft).
  6. Lower the vehicle.
  7. Serpentine belt.

Posted on Jun 02, 2009

Anonymous

  • 1 Answer

SOURCE: 2004 nissan sentra bad camshaft sensor, replaced

I am having the exact same problem. Did you get it running

Posted on Nov 21, 2009

Anonymous

  • 2 Answers

SOURCE: crankshaft and camshaft sensors location in nissan altima 2003

You are incorrect sir. There is a very good Youtube video showing you exactly where it is that is how I changed mine. The Crankshaft is located behind the engine block below and around from the cam sensor which is easly spotted looking at the engine. The crankshaft is in a difficult spot but once you figure out where it is it's easy...ish hope this helps

Posted on Dec 10, 2009

Anthony LaGreca

  • 248 Answers

SOURCE: where are the camshaft and crankshaft position

crankshaft sensor is and the hormonic balance pulley and cam sesoor should b and the front of the motor toward the top. But to b sure u should get a book for u vehical

Posted on Mar 09, 2010

Jerry Van Sickle

  • 334 Answers

SOURCE: I need the wiring diagram

Hello kriswdorsey,

Below are pictures of the cam position sensor and the crank position sensor. I hope this helps.



netvan_96.png

netvan_97.png


Regards,
netvan

Posted on Apr 17, 2011

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1 Answer

I have a 2002 gmc sonoma 4.3 v6 45000 miles. Turns over but won't start. Changed camshaft position sensor and crankshaft sensor. Can't afford to take to a shop. Code p0014.


this code refers to cam shaft timing. if the connections are good with the sensor and readings are good when tested with a volt and ammeter then the cam timing maybe be off what it should be. it could also be the ECM causing a problem.

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Crankshaft sensor wiring diagram 2002 gmc Sonoma


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For testing crank sensor,check the help link below:---How to test Crankshaft Position Sensor? http://fordrepairhelp.blogspot.in/2012/03/how-to-test-ford-focus-crankshaft.html
----------

How to test Crankshaft Position CKP Sensor?

---------------
Crankshaft Position Sensor Operation?

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Replace Camshaft position sensor and Crankshaft Position Sensor? http://technoanswers.blogspot.in/2012/06/2005-dodge-durango-replace-camshaft.html
----------
GMC Crankshaft Position (CKP) Sensor Replacing? http://schematicsdiagram.blogspot.com/2011/12/gmc-crankshaft-position-ckp-sensor.html

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These details will help.
Thanks.

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PO102 = mass airflow circuit low. Means there's a problem with the mass airflow sensor or circuit. Could be the sensor is disconnected, dirty, or faulty. PO340 = camshaft position sensor circuit. Could be ground wire disconnection, camshaft position sensor failed, PCM is failing, or even the crankshaft position sensor has failed. Good luck. Let us know how it turns out.

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My 2002 envoy won't start, turns over fine. I have no power to the fuel pump, I have power at the fuse and relay. Has anyone heard of a camshaft or crankshaft sensor being faulty and turning off power...


You say you have power at the relay, but what part of the relay? If you don't have 12V at the gray wire going to the pump, then maybe the relay is bad. Also check to see what voltage you have on the dark green/white wire, this controls the relay (should be 12V).

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Engine won't start when it's warm. Acts flooded. Can usually get it started after 5 minutes or so. Runs rough for 5-10 seconds and then works great. 27-28 mpg. So far changed plugs, one plug...


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try LUCAS injector cleaner- works on my sonoma

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The P0014 is a cam phasing code. The phasing system is a hydraulic actuated phase shifting system and is vulnerable to dirty oil. If its been sometime since your last oil change I would recommend that you start with that. The control module turns off the MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail.

The P1345 could be caused by the P0014. The powertrain control module monitors the correlation between the crank and cam positions and if the deviation between the two exceeds a predetermined amount it will set the code.

Good luck.

Regards,
netvan

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Hello trhino69.

The Regal has two position sensors.
One on the crankshaft and another on the camshaft.
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On the other hand if the camshaft sensor isn't reading it will start but the fuel injectors will revert to non-sequential firing.
The crankshaft sensor is mounted at the crankshaft harmonic balancer.
It is #4 in the diagram below.

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This should answer your question.

KL

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