Question about 1998 GMC Sierra

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Code 1345 changed distributor, timing gears and crankshaft sensor and plug< and the code is still there. distributor is correct

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  • yadayada
    yadayada May 11, 2010

    ISN'T ABOUT TIME U HAVE THE DEALER FIX THIS? U MAY ALSO TRY OUR LIVE CHAT OPTION, WHAT'S ANOTHER $20?

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P1345 - Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation

Try adjusting the sensor. if this doesn't work, replace it asap.

Posted on Jun 24, 2009

  • Michael Masters
    Michael Masters Jun 24, 2009

    In most cases, the sensor may be over torqued.

    You cant over torque it because, it will cause false readings.


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2000 trail blazier with random misfire,sulfur smell, glowing convertor. New cap,rotor button plugs,plug wires and convertor NO CHANGE ! ANY IDEAS ?


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The camshaft drives the distributor shaft which rotates providing a spark to the correct cylinder by way of the cap and rotor. The camshaft position sensor functions much like the crankshaft sensor previously described but provides only a 1x signal to the VCM. That is, for every 2 rotations of the crankshaft, there is 1 rotation of the camshaft. Note that the CMP sensor will not affect driveability. The sole purpose of the CMP sensor is to provide the VCM with the necessary information for the misfire DTCs.

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GM OBD2 code 1345 causes


either the crankshaft sensor needs to be changed or camshaft sensor.Both work together and are under that code.If you change the sensors you will need a crankshaft profile correction.This should be done by your dealer with the proper scan tool.

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How to fix p1345 obd code on 97 chevy 1500 5.7 Lt.


P1345 is "Crankshaft position sensor / Camshaft position sensor correlation"

Code P1345 determines if the distributor is installed incorrectly, or if a mechanical malfunction is present in the engine. The light will trigger when the engine is running and the camshaft sensor reference pulse is not detected at a correct relative position with the crankshaft pulse. Most likely causes for this Chevy check engine light code include a faulty crankshaft position sensor, a wiring concern or an improperly installed distributor. A quick check on the crankshaft sensor is to monitor the RPM value with a scan tool while revving up the engine. If the reading is close to twice the expected RPM, then the sensor is likely faulty. There are other less likely concerns possible, such as base engine or computer related issues, but these involve more in depth testing. I hope this information is useful.

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Code 1345 pops up why


This code is an indication that the synchronization between the Crankshaft and Camshaft is off.
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Code 1345 came up. I already replaced wires, plugs, cam, crank sensors.


have you tried setting the cam sync.its basically setting the timing but without a timing light.you need a scan tool to do it.rev engine and hold at 1000 rpm.read the cam sync on the scan tool.should be 0 degrees.if not loosen distributor bolt and turn distributor till cam sync reads 0.also you may have a worn distributor.

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Trouble code 1345 crank sensor/camshaft sensor correlation


I had this same P1345 code on my 1998 GMC K1500 5.7 for about 2 years. Each time the code was erased, the "Service Engine Light" came right back on with the same code. I tried replacing the cam sensor, but that didn't solve it. I had the timing adjusted, it was out -13 degrees. After adjustment, the "Service Engine Light" went off, but only for a short time. Adjusting the timing is just a temporary mask on fixing the real problem and eventually you will run out of adjustment. I read about this same problem on another forum and someone recommended changing the distributor gear. So I checked the gear and a the teeth were worn. Replaced the gear ($35 part), readjusted the timing and the light has been off ever since. Apparently the gears in 96-99 are soft and wear enough to throw off the timing. This code is telling you the crank and distributor are out of sync. So before you start buying sensors and other misc. parts, try the distributor gear if you are getting a P1345 code.

Mar 03, 2009 | 1998 GMC Sierra

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