P0016 and P0017 Fault in 2009 Chevrolet Malibu 2.4L After Timing Kit Replacement
I recently installed a new timing kit on my 2009 Chevrolet Malibu 2.4L about a month ago, and the engine ran perfectly after installation. However, I'm now experiencing fault codes P0016 and P0017, and the vehicle will not start properly—only firing once during initial attempts. I've verified that the camshaft timing marks are correctly aligned, but I am unable to visually confirm the crankshaft position mark without further disassembly. Could this be related to a misalignment or a failure in the variable valve timing (VCT) system?
Why was a timing chain replaced? Have you checked the timing offset using an OBD2 scanner—specifically the degree difference between the crankshaft and camshaft at TDC? Could there be an issue with the VCT solenoids or a sticking actuator? Did you confirm that the VCT actuator was properly 'parked' during installation? My best guess is that the VCT system isn't functioning correctly, causing the cams to remain in a parked position due to faulty solenoid operation. *Note: Without confirming the crankshaft position mark via disassembly, I assume it's aligned at TDC for easier troubleshooting.*