Detonation (Knock) Retard
WARNING: This page is about a different car, the 1995 Nissan 200SX. However, it is still accessible from the selected car via links, so may be relevant.
Faults in knock sensor (detonation retard) circuit may set DTC 34 (P0325). To test system, see DTC 34 (P0325) diagnostic procedures in the G - TESTS W/CODES - 2.0L article. To test knock (detonation) sensor, see ENGINE SENSORS & SWITCHES .