P001685

William Manager Cleveland, Ohio Posted   Latest  
Question
Driveability
2013 Mercedes-Benz GL450 4.6L (278.928) 7-spd (722.9)

Looking for help with code p001685 saying left bank intake cam out of sync with crank or implausible. Have replaced chains gears and swapped sensors to no avail. Any help would be greatly appreciated 

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Scott Owner/Technician
Osceola, Iowa
Scott Default
 

Need to look at cam and crank sensor with lab scope .to see wave pattern.

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Wesley Mobile Technician
Minneapolis, Minnesota
Wesley Default
   

Was this code present before you did repair ? if so try reboot of ecu could be new cam n crank correlation not learned

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William Manager
Cleveland, Ohio
William Default
 

Yes was there previous to repairs chain was extremely loose. Tried doing chain replacement teach in process . 3 of the 4 cams read about .5°-1.1° difference while the bank 1 intake cam is giving a -1476.01 difference. Could this be a actual camshaft issue?

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Brian Instructor
Parma, Ohio
Brian Default
 

Can you share cam and crank signals from scope, take a picture if you need to.

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William Manager
Cleveland, Ohio
William Resolution
 

Just to let you guys know that the issue was the camshaft. The reluctor wheel had spun causing the code

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Brian Instructor
Parma, Ohio
Brian Default
 

Thank you for letting us know. Feel free to post pics if you can.

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