P0325 on Nissan
Knock Sensor 1 Circuit Malfunction (Bank 1)
P0325 on Nissan vehicles indicates knock sensor 1 circuit malfunction (bank 1). Au7o has documented this code across 1 Nissan model — most commonly on Frontier. This code indicates a fault in the knock sensor 1 circuit on Bank 1. The knock sensor listens for the vibrations of detonation (pinging/spark knock) and lets the computer retard ignition timing to protect the engine. When the sensor's signal is missing, out of range, or the circuit is open/shorted, P0325 sets. With knock detection compromised, the computer may run more conservative timing, causing reduced power and slightly lower fuel economy, and the engine is less protected against damaging knock. Typical repair costs on Nissan range from $250 to $700, depending on the specific model and root cause.
Common Causes of P0325
- •Failed knock sensor
- •Corroded or loose knock sensor connector
- •Damaged, open, or shorted sensor wiring
- •Improperly torqued or loosely mounted sensor
- •Moisture or corrosion in the connector
- •Wiring harness chafing near the engine
- •Faulty PCM/ECM (rare)
P0325 on Nissan by Model
Nissan Frontier(1 issue)
- Distributor / Ignition System Failure Causing Sudden Stall or No-Start2000-2004
A well-documented failure on first-generation Frontier V6 trucks is the distributor assembly, especially the internal cam/crank angle sensor and bearing wear inside the distributor. Owners report intermittent bucking, random stalling, hard starts, and eventual crank-no-start, often after the engine warms up. Nissan issued service information for distributor-related drivability faults, and owner complaint patterns are consistent across Frontier and related Xterra applications using the VG33E/VG33ER.
Looking for P0325 on a different make?
View P0325 across all makes →Frequently Asked Questions
What does P0325 mean on Nissan?▼
P0325 stands for "Knock Sensor 1 Circuit Malfunction (Bank 1)." This code indicates a fault in the knock sensor 1 circuit on Bank 1. The knock sensor listens for the vibrations of detonation (pinging/spark knock) and lets the computer retard ignition timing to protect the engine. When the sensor's signal is missing, out of range, or the circuit is open/shorted, P0325 sets. With knock detection compromised, the computer may run more conservative timing, causing reduced power and slightly lower fuel economy, and the engine is less protected against damaging knock. On Nissan specifically, this code is documented across 1 model.
What causes P0325 on Nissan vehicles?▼
Common causes on Nissan: Failed knock sensor, Corroded or loose knock sensor connector, Damaged, open, or shorted sensor wiring, Improperly torqued or loosely mounted sensor, Moisture or corrosion in the connector. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0325 on a Nissan?▼
Repair costs on Nissan range from $250 to $700, depending on the specific model and root cause.
Which Nissan models have P0325 documented?▼
Au7o has documented P0325 on 1 Nissan model: Frontier.