P0336 Fault Code on 1996 Chevrolet Lumina 3.1L: Sensor Replacement and Diagnosis Guide

I recently encountered a P0336 diagnostic code on my 1996 Chevrolet Lumina 3.1L engine. I replaced the crankshaft position sensor located behind the crankshaft pulley over the weekend, but the P0336 code has persisted. Based on the OBD-II fault code reference, P0336 typically refers to a malfunction in Sensor A — the primary crankshaft position sensor mounted near the crankshaft pulley. I have confirmed that this is indeed the sensor being referenced by the code. My vehicle also has a second crankshaft sensor (Sensor B), located on the lower engine block, closer to the firewall and passenger side. I tested this secondary sensor with an ohmmeter and obtained a reading of 1044 ohms, which falls within the acceptable range for proper operation. I believe this sensor is functioning correctly. I’ve also considered that a defective crankshaft pulley could potentially trigger a P0336 code due to signal interference or mechanical issues. Additionally, I suspect the wiring harness connector or one of its internal wires leading to Sensor A might be faulty — especially if there’s poor electrical contact or corrosion. Any insights or troubleshooting steps for this specific issue on a 1996 Lumina 3.1L would be greatly appreciated. Thanks in advance! Wyr God bless