Owners of some 2020 Encore GX and 2021 Trailblazer models equipped with the 1.3L engine (RPOT L3T) may notice an unstable engine RPM at idle and an illuminated Check Engine MIL.
Any of the following DTCs also may be set: P0011 (Intake Camshaft Position System Performance), P0014 (Exhaust Camshaft Position System Performance), P0016 (Crankshaft Position – Intake Camshaft Position Not Plausible), P0017 (Crankshaft Position – Exhaust Camshaft Position Not Plausible), P05CC (Cold Start Intake Camshaft Position System Performance), and/or P05CE (Cold Start Exhaust Camshaft Position System Performance).
These conditions may be caused by the camshaft position actuator valve solenoid bolt becoming stuck internally when the engine oil is hot. The intake and exhaust camshaft position actuator valve solenoid bolts (Fig. 25) should be replaced if these conditions occur.
TIP: These repairs apply only to customers’ vehicles. Refer to Bulletin #20-NA-151. For vehicles in dealer inventory, refer to A202304840-01: Service Update – Camshaft Actuator Oil Control Valve Center Bolt Binding.
Fig. 25
Before removing the camshaft cover, the camshaft position actuator magnet (intake/exhaust) should be removed. (Fig. 26, intake magnet) If the camshaft cover is removed or installed with the actuator magnet installed, the protrusion of the camshaft position actuator valve solenoid bolt can be broken due to interference with the cover.
Fig. 26
Refer to Bulletin #20-NA-151 for additional information and part numbers.
– Thanks to Jeff Kropp
