1999 Nissan Maxima Power Wire Blinking and Knock Sensor Code: Diagnosis and Fixes

Model: 1999 Nissan Maxima Fault Code: P0171 Posted: 2016-08-20 08:32

My 1999 Nissan Maxima is showing a blinking power (+) wire on the ignition coil and airflow meter while running, but not when the key is on and engine off. This intermittent blinking behavior occurs only during engine operation and is accompanied by a knock sensor fault code. I'm unable to identify the root cause despite checking basic connections and fuses. The issue appears to be related to both the ignition coil's power supply and airflow meter signal integrity, possibly indicating an electrical grounding or wiring problem. I need help diagnosing whether this is a faulty component, loose connection, or a sensor-related fault that could lead to engine performance issues or misfires.