Toyota Yaris 1999 1.0L Engine Fault P1394: VVT System Issue After Timing Chain Replacement

Model: Toyota Yaris Fault Code: P1394 Posted: 2012-05-21 12:20

I own a 1999 Toyota Yaris with a 1.0L engine. Recently, I replaced the timing chain, but after the replacement, the engine light came on and displayed fault code P1394 related to the VVT (Variable Valve Timing) system in Bank 1. Is this a serious issue? What steps should I take to diagnose and fix it?