Code Definition

P0329 — Knock Sensor 1 Circuit Input Intermittent (Bank 1 or Single Sensor)

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0329

P0329 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0329 is stored, the module has detected a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0329 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0329 fault code is set when the powertrain control module (PCM) detects an intermittent or unstable signal from knock sensor 1 on Bank 1. This inconsistency can affect the PCM’s ability to monitor and respond to engine knock effectively, potentially leading to suboptimal engine performance.

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