OBD Guide

P1327

Knock Sensor 2 Low Input

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Detonation knocks during acceleration
  • Check Engine Light Illuminates
  • Unstable engine idling

Causes

  • Knock sensor malfunction
  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Wiring harness damage
  • Problems with the engine control unit (ECU)

How to Fix

  1. Check the integrity of the sensor wiring and connectors
  2. Test the resistance of the knock sensor
  3. Check the voltage in the sensor circuit
  4. Replace knock sensor if necessary
  5. Reset the error code and check if it returns

Related codes

Error P1327 by Vehicle Brand