A stretched timing chain in your 2013 Chevrolet Equinox at 150,000 miles is a well-documented problem with the 2.4L Ecotec engine. This engine has experienced widespread timing chain failures, and your high-mileage vehicle is at significant risk if symptoms are present.
The Ecotec Timing Chain Issue
GM's 2.4L Ecotec engine in the 2010-2017 Equinox has experienced premature timing chain wear at rates far exceeding expectations. The timing chain, guides, and tensioner wear together, eventually causing timing to slip. This has resulted in class action lawsuits and TSBs.
Why This Engine is Prone
The combination of high-pressure direct injection and the balance shaft arrangement puts unusual stress on the timing drive. Oil quality is critical - contamination accelerates wear. Many owners experienced failures well before 150,000 miles.
Code P0014 Significance
This code indicates exhaust camshaft timing is over-advanced. In the Ecotec, this almost always points to timing chain stretch allowing the cam to drift from commanded position. This code with rattling noise is a strong indication of timing chain failure in progress.
Repair Urgency
Once the timing chain is stretched enough to cause symptoms, failure becomes imminent. A skipped or broken timing chain destroys this interference engine - pistons contact valves. At 150,000 miles with symptoms, repair should be immediate. Expect $1,500-2,500 for chain, guides, and tensioner replacement.