Engines With Camshaft Position Codes (TT 05/14-M)

Publication date: 2014-05-01
Reference number: TT 05/14-M

ENGINES WITH CAMSHAFT POSITION CODES

DEALER TECH TOPICS; MAY 2014

Reference Number(s): TT 05/14-M, Date of Issue: May 2014

MERCEDES-BENZ:	All Models with M272, M273, M276, M278, M152, M157 Engine
GROUP:	05.20 - Camshaft, camshaft adjustment, 07.04 - Sender, Feeler, Sensors

TOPIC

Engines with camshaft position codes

CAUSE / EXPLANATION

Tip for diagnosing camshaft position issues and timing appears correct but new positions cannot be taught-in and codes remain.

CORRECTION

Fabricate a harness using an old engine harness or shop supplies so that the connections for the cam position sensors can be swapped from one bank to the other. If the code(s) remain the same with the harness installed, the issue may be with the ME. If the code(s) change to the opposite bank then a mechanical issue is the cause. i.e. oil pressure or stretched chain.