OBD Guide

P033C

Knock/Combustion Vibration Sensor D Circuit Low

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Detonation (knocking) in the engine
  • Unstable operation at idle

Causes

  • Knock sensor fault D
  • Open or short circuit in wiring harness
  • Poor contact in the sensor connector
  • Problems with the ECU

How to Fix

  1. Check the integrity of the knock sensor wiring harness D
  2. Check the contacts in the sensor connector
  3. Replace knock sensor D if necessary
  4. Check the operation of the computer

Related codes

Error P033C by Vehicle Brand