Low Engine Oil Pressure after Major Engine Repairs

After major engine repairs, low engine oil pressure and DTC P06DE (Engine Oil Pressure Control Solenoid Valve Stuck On) set in the Engine Control Module (ECM) may be the result of an improperly installed or out-of-position timing chain tensioner gasket on some 2016-2018 Encore, Cruze, and Trax models equipped with the 1.4L 4-cylinder engine (RPO LE2); 2016-2018 Spark equipped with the 1.4L 4-cylinder engine (RPO LV7); 2016-2018 Malibu equipped with the 1.5L 4-cylinder engine (RPO LFV); 2016-2018 Volt equipped with the 1.5L 4-cylinder engine (RPO L3A); and 2018 Equinox and Terrain models equipped with the 1.5L 4-cylinder engine (RPO LYX).

If low oil pressure is suspected, verify the oil pressure is below specification by completing the oil pressure diagnosis and testing procedures outlined in the appropriate Service Information. Also complete the Service Information diagnostics for DTC P06DE.

If oil pressure is confirmed to be below specification and major engine repairs were performed recently, check that the timing chain tensioner gasket is installed correctly (Fig. 10) and not out of position.

Fig. 10

An incorrectly installed gasket (Fig. 11) may provide a leak path for pressurized oil to bleed off behind the timing chain cover.

Fig. 11

When installing the timing chain tensioner gasket, ensure it lines up properly in relation to the mounting bolt holes. (Fig. 12)

Fig. 12

– Thanks to Richard Halas

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