Mercedes C270 With m272 v6 Engine Scope Wave Form

I have a mercedes with gave me the following codes:

1208 Constant Adjustment Of Intake Camshaft Of Right Cylinder Bank In Direction ‘Retarded'(P0016)
Stored

0745 Self-adaptation Of Mixture Formation For Enrichment At Idle For The Right Cylinder Bank Is Above The Permissible Limit.(P0171) Current and stored
0749 Self-adaptation Of Mixture Formation For Enrichment At Idle For The Left Cylinder Bank Is Above The Permissible Limit.(P0174) Stored
0810 Malfunction Of Secondary Air Injection At Right Bank Of Cylinders(Function chain)(P0410)
Current and stored

0814 Malfunction Of Secondary Air Injection At Left Bank Of Cylinders(Function chain)(P0410)
Current and stored

0732 Continuous Camshaft Adjustment( RIGHT ): Incorrect Position Of The Exhaust camshaft(P0014)
Stored
0736 Continuous Camshaft Adjustment( LEFT ): Incorrect Position Of The Exhaust camshaft(P0024)
Stored

I use a scope to check the cam and all camshafts sensors. I do suspect that the timing chain is worn but to make sure I use the scope to confirm it. If you look at the image below you will notice that only one cam line up and that is the r/h intake cam. The cam’s wave must line up with the red line when it goes up or at the beginning when the sensor and the sensor plate meets.

The chain is connected to both left and right intake adjuster, and via gear train to the exhaust adjuster. If base timing is of on the intake, then base timing is of on the exhaust cams as well. I am going to to this job soon to correct this problem then I will update the results.

Well the job was done and no more codes and the car is running perfectly, but I must warn you, you have to make sure that the chain timing marks are correctly.

Merc 272 Wave form

 

Updated: 21st Jan 2020 — 6:49 pm

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