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Just had new fuel injectors installed on my 1998 gmc and service engine light came on after completion and code is P1345-what is that?

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CKP (crankshaft position sensor)

Posted on Aug 08, 2010

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1 Answer

1998 gmc z71 surges in drive p1345


The P1345 means SGC (Cam Position) sensor circuit malfunction/crankshaft position-camshaft position correlation
P0300 means random/multiple cylinder misfire detected

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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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1998 gmc k1500 random misfires code p0300 replaced distributor, wires ,plugs, cap and fuel injectors i,m running out of ideas


There is more than just ignition that could be the issue, including fuel injectors and EGR. Try this link to see if you get more ideas:

http://www.engine-light-help.com/P0300-check-engine-light.html

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I hava a 1998 gmc with a 5.7 began skipping have


p1345 if the distribator has been taken out it will bring up this code lift it back up and turn it one tooth in either direction reset the code and check it p1404sounds like egr cheapest place too get one is rockauto.com

Apr 20, 2010 | 1998 GMC Sierra

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After i got fuel truck stalled re started then


clogged/bad injectors. fortunately you can get diesel injectors fixed.

thats what it sounds like. is your engine light on.. any codes?

Apr 13, 2010 | 1998 GMC Sierra

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I have 1998 sierra 1500 vortec 5.0 liters,when engine is cold (below 35 degre f )engine turn but don t start,i have fire,fuel pump run and i have pressure on my main fuel line juste before injector pack...


Camshaft To Crankshaft Position Correlation Fault is what p1345 means. if the problem isnt electrical I would imagine the timing chain could be stretched and the engine is out of time somehow

Nov 18, 2009 | 1998 GMC Sierra

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I have recieved the following codes from 1998 GMC Sierra: P1345 and P0300b. I have tryed wvweything from full tuneup to feul filter to crank sensor, coil and distribtor. It is hesitating at park throttle....


DTC P1345 CAMSHAFT TO CRANKSHAFT POSITION CORRELATION MALFUNCTION CONDITIONS.CHECK CMP SENSOR MAKE SURE ITS NOT LOOSE CAUSING VARIATION IN THE SENSOR SIGNAL EXCESSIVE FREE PLAY IN THE TIMING CHAIN AND GEAR ASSEMBLY.INCORRECTLY INSTALLED DISTRIBUTOR 1 TOOTH OFF IN EITHER ADVANCE OR ****** POSITIONS. CODE PO300 MULTIPLE ENGINE MISFIRE DETECTED CONDITIONS.THIS CODE WILL SHOW UP WHEN CODE DTC P1345 SHOW UP.YOUR PROBLEMS IS IN THE CMP AND CKP SENSOR.THEY WILL CAUSE MISFIRE IF TIMING CHAIN WORN WITH A LOT OF SLACK IN IT.CAUSING TIMING CHAIN TO SLIP ONE GEAR THROWING OFF TIME.THIS PROBLEM IS A DEALERSHIP FIX.THEY CAN CHECK TO SEE IF TIMING CHAIN HAS SLIPPED.THEY ALSO CAN CHECK VARIATIONS FROM CMP SENSOR AND CKP SENSOR.

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The engine surges


Have you checked to see what the actual fuel pressure is at the fuel injectors?

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1998 silverado misfire


Check for a vaccum leak at the intake. Frankster016

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