2011 Chevrolet Traverse LT 3.6L V6 P0017, P2105, P0336, P0303 - Engine Stalls, Won't Start Past 1500 RPM
A friend reported her 2011 Chevrolet Traverse LT with a 3.6L V6 engine stalled at a traffic light and would not restart. After attempting to jump-start the vehicle, it eventually started but the service light was flashing and the engine only reached approximately 1500 RPM and 15 mph. We brought it home and connected a scan tool, which revealed codes P0017, P2105, P0336, and P0303. The engine cranks slowly, almost as if it's trying to start but fails to ignite properly. We checked the oil level and found it low—had to add two quarts, as the last oil change was overdue. The crankshaft position sensor was replaced with no improvement. Despite this, the vehicle still exhibits poor performance and intermittent stalling. The P0017 code suggests issues with cam or crankshaft position sensors, timing chain wear, or misalignment. Possible causes include a stretched timing chain, skipped tooth in the timing belt, damaged tone rings on the crank or camshafts, faulty sensor wiring, or a stuck solenoid (such as the CMP actuator). The P0336 code indicates a problem with the camshaft position sensor, which may be related to incorrect signal detection. Additionally, P0303 points to a misfire in cylinder 3, possibly due to ignition or fuel system issues. Given that the vehicle briefly ran normally for about one minute before stalling, it suggests intermittent electrical or mechanical faults—possibly involving a stuck solenoid or oil-related interference (e.g., loose oil filter causing internal pressure issues). Low engine oil levels can also negatively impact VVT systems and overall engine performance. We recommend clearing the codes and monitoring which ones appear first during operation. A professional diagnostic check of cam/crank signal correlation is advised to confirm root causes, especially since sensor replacements have not resolved the issue.
Begin by checking battery cranking voltage—ensure it's within normal range (typically above 9.6V) during engine cranking.