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P0320

Overview

Code

P0320

Code Type

P

Code Class

P0

System

Engine

Severity Level

High

Emissions Related

true

Drivability Impact

Major

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0320 indicates a malfunction in the knock sensor circuit

Symptoms

Engine knocking; Reduced power; Poor fuel economy

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Ignition timing control and engine protection

Possible Causes

Faulty knock sensor; Wiring issues; ECM fault

Diagnostic Steps

1 Inspect knock sensor wiring and connectors; 2 Test knock sensor resistance; 3 Monitor knock sensor data during engine load; 4 Replace sensor if faulty

Drive Safety Notes

Engine knocking may cause internal damage Avoid high load

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