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I put a rebuilt long block in my C2500 5.7 L I'm getting a P1345 code and she's running a little rough. I replaced the cam shaft sensor in the distributer but still getting code

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  • Cars & Trucks Master
  • 4,134 Answers

The code is set if the relationship between the crank and cam sensors is not within tolerance. In your case the most likely problem is (and especially since she is running rough) that the distributor was reinstalled one tooth off in either direction from where it should be.

Posted on Nov 24, 2013

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Posted on Jan 02, 2017

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  • 834 Answers

SOURCE: Rebuilt my 454 engine, installed distributor with

The ignition timing is not adjusted with a timing light or with the engine running, and to set the ignition timing follow these procedures.

There is a mark or notch on the distributor housing that the rotor should be pointing to when the engine is on TDC. (Top Dead Center) This "Static" timing is all that matters and the computer will be able to control the timing as long as the ignition rotor is in that position when the engine is at TDC.

1. Place the engine at top dead center.

2. Look under the distributor cap and find where the number one terminal runs under the distributor cap, and where that position on the distributor cap corresponds with the distributor housing, and it should match up to a mark or a notch on the distributor housing (usually has a #6 for 6 cylinder engines or a #8 for 8 cylinder engines) indicating the number one TDC alignment position.

3. With the engine on top dead center the ignition rotor should be pointing to the number one TDC alignment mark or notch that is on the distributor housing, if it is not then loosen up the distributor and turn the distributor until the ignition rotor is pointing to and aligned with the TDC alignment mark or notch on the distributor housing and then tighten down the distributor, the engine should now be "Static" timed. (The more precise that you are aligning the TDC alignment mark with the ignition rotor the better the engine will run, and it will be less likely that there will be a camshaft to crankshaft correlation problem)

If the distributor can not be turned enough to align the ignition rotor with the number one TDC alignment mark on the distributor housing, or the distributor does not set properly and will not allow the installation of the spark plug wires then the distributor is not installed correctly and is most likely a tooth off and it will need to be re-installed correctly. (The distributor should set like it is shown in the firing order diagram when it is properly installed)

Here is a firing order diagram to also help assist you.




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Posted on Oct 25, 2010

dnewcombe1
  • 1564 Answers

SOURCE: rough running

Computers aren't ALWAYS correct. If a code wasn't cleared after the original problem, it will read the same codes off to the diagnostic. I would remove the wire connector to each injector while it's running. If one of them makes no difference THAT is your culprit. Let me know please!

Posted on Jun 27, 2009

  • 118 Answers

SOURCE: running dtc p1345

You may have the distributer a tooth off and the computer can not calibrate the timing properly. Set the engine at (top-dead center) at the crank harmonic balancer and remove dist-cap to see if the "DTC" is off. If so, when distributer is out, you will have to use a longer flat head screw driver to reach down in the intake and turn the oil pump shaft to advance it for the re-installation of the distributer as it will turn when threading into the cam gear. Hope this helps.

Posted on Jul 31, 2009

ercupa190
  • 12223 Answers

SOURCE: how do i fix it the code is P1345

P1345....Camshaft to crankshaft position correlation fault see the video and fix it. God bless you

Posted on Sep 28, 2012

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1 Answer

Replaced cam/crank position sensor with no change in rough running engine. Syncronizer has not been replaced. Do I need a tool to syncronize both sensors? It's not been rebuilt or jumped time.


position sensors have little to do with rough running engine
items like bad injectors, problem ignition control module, fuel pressure , HT leads valves, vacuum leaks all contribute to rough running
best run the fault codes first to determine what area to look at and fix the reported faults

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With that much mileage everything is worn!

code p1345 which is crank shaft camshaft position error code.

If the distributor moved that is why the code is present. The dis. in these trucks does not control ignition timing it controls injector timing (it is the cam sensor).

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Sevice code p1345 what is it truck runs good put fells like is missing at idel


p1345 is manufacture control ignition system or misfire.--. A loose CMP (cam position sensor) causing a variance in the sensor signal.

2. Excessive free play in the timing chain and gear assy.

3. Incorrectly installed distributor-1 tooth off in either advanced or ****** positions.

4. A loose rotor on the distributor shaft.

5. A loose or missing dist hold down bolt. check and or adjust distributor and shaft, could also be a bad gear on end of dist.

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I own a 1999 GMC Jimmy that i recently had new plugs wires dist cap rotor camshaft sensor and crankshaft sensor.It seems the service engine soon light came on.When put on a diagnostic machine its telling...


The machine it talking about code P1345 CKP/CMP sensor correlition Do the engines RPMS fluctuate at idle or if you try to hold it at a steady speed if so then check the connection at the CKP make sure it is getting voltage its installed correctly and so on. If no problems are found then you need to check the distributor shaft remove the cap and see if the rotor turns on the dist shaft if it dose then thats the problem and eigther must be replaced or rebuilt thats the distributor it self

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1 Answer

2002 trailblazer 4.2 4wd i have a code p1345 that keeps returning ive replaced the cam postion sensor and the crank sensor and the cam postion actuator solenoid i just put the cam position actuator...


beleive it or not changing the oil if dirty will solve this code, also found that connector gets oil in it and that also makes p1345 code turn on, open connector and look for oil in it,look at sensor and actuator plugs for oil,the main plug connector is the actuator plug it fills with oil and makes contact between pins setting p1345 code, hope this helps.

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2 Answers

What is code P1345?


I had the p1345 on my 2002 Silverado this week. The code means Crankshaft/camshaft position correlation. In other words the cam is not where it is supposed to be in reference to the crank. It could be the Cam position sensor, the crank position sensor , the gear on the distributor or the timing chain. The quickest and cheapest check is the distributor gear which is what mine was. It's quite common. The gear is about $60 and can be replaced in less than an hour with the right experience. The engine won't usually run if it's the crank sensor and the cam sensor is a little more.

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2 Answers

Replaced crank shaft position sensor from autozone. erased all codes. still showing code p1345. ive been told to use acdelco. am i doing something wrong?


Code p1345 is the crankshaft variation learn.You need to get the crankshaft variation learn done for the code to clear.You will need a scan tool.This should take care of the check engine light.Hope this helps.Good luck.

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I rebuilt a 350"R" vortec in a 1998 GMC suburban. It runs good except for a slight cutting out sometimes. It always has a code P1345. After erasing the check eng. light will come on almost immediatly after...


I take it,you replaced the crankshaft sensor,now,the cam sensor(pick up coil)is most likely the problem,it is either not lining up,or,there is wear in the distributor.The crankshaft sensor is not aligning with the cam sensor(pick up coil).

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