Code Definition

P0323 — Ignition/Distributor Engine Speed Input Circuit Intermittent

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

About P0323

P0323 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 P0323 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 P0323 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 P0323 fault code is set when the powertrain control module (PCM) detects an intermittent signal from the engine speed input circuit. This signal, typically provided by the crankshaft position sensor or distributor, is essential for accurate ignition timing and fuel injection control. An intermittent signal may cause erratic engine performance, stalling, or difficulty starting.

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