Question about 2003 GMC Envoy

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2003 GMC Envoy code P1345 My book says correlation between camshaft sensor and crankshaft sensor. It started idling rough. Runs OK otherwise, maybe a little lacking power. Also, code P0105 MAP sensor (I replaced already) and code P0128 Coolant temp sensor. Any help? THANKS!!

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  • skoz1 Aug 02, 2010

    I cleaned camshaft position solenoid. This got rid of the rough idle. I also cleaned the throttle body, which was very gunky. Envoy runs smooth again with no apparent issues.
    THANKS

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P1345  "Camshaft To Crankshaft Position Correlation Fault"

Maybe a sensor ( camshaft or crankshaft position) is failing or has a bad connection at the plug. 
Check both the camshaft and crankshaft sensors:-- The camshaft Position sensor (CMP) Is located on the front of head, directly above the belt. Small bolt holds it in, and it is a round sensor. If any belt maintance was done recently, Look for the sensor to have been damaged. It is the electrical connector that is EASILY damaged by a ratchet when turning the belt tensioner to remove belt. camshaft position sensor, Don't forget to remove and clean the camshaft position solenoid.
908 is the sensor 421 is the Solonoid. click on the link directly :-- 
http://www.compnine.com/largeimg/060425TS00-402.gif The one on the front of the block is easy to replace and the cam position sensor actuator solenoid is on the side. To replace the one on the side, where you may also find oil in the electrical connector, the serpentine belt must come off and the power streering pump must be loosened by inserting a socket through the holes in the pulley where there are three bolts.  ---------- The crank sensor is located on the drivers side rear of engine just below the starter.  Check both this sensors.clean the sensors and refit it and check.If still the same error code 1345 then its either the faulty sensor or timing issue.The timing belt needs to be rechecked. Also the camshaft position sensor code may have set because of the low oil pressure to the variable timing system from low oil in the motor.  Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Posted on Aug 02, 2010

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Hi...I have a GMC Envoy 2003 SLT, I changed all sensors that diagnostics gave me. My SUV is still shuts off on idle...please someone help me fix this issue. Thank you!

Posted on Oct 20, 2014

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