1998 Nissan Quest GXE P0325 Fault: Spark Plug Lead Arcing Causing Engine Misfire

Model: 1998 Nissan Quest GXE Fault Code: P0325 Posted: 2012-10-27 18:15

A 1998 Nissan Quest GXE owner reported persistent engine roughness and repeated appearance of fault code P0325, indicating a knock sensor issue. After diagnostic testing, the root cause was identified as arcing within a spark plug lead that was shorting to the engine block. The faulty wiring was replaced with a new set of spark plug leads. Following the repair, the P0325 code cleared and engine performance improved significantly. Repair cost: $40. This case highlights the importance of inspecting spark plug harnesses when diagnosing knock sensor-related issues in older Nissan Quest models.