What are the common causes of P032E?

An intermittent knock sensor C fault. A loose or corroded sensor C connector. Wiring chafing on the sensor C circuit. An engine mechanical fault causing knock. A faulty ECM input.

Monitor knock sensor C on a scan tool for dropouts. Inspect the sensor C connector and wiring for looseness. Wiggle test the harness while watching the signal. Scan for engine knock under load. Replace knock sensor C if it drops out. Clear the code and retest.

P032E

Knock/Combustion Vibration Sensor C Circuit Intermittent

System: Ignition and misfire (P code)
Lamp: Check Engine Light
Category: Powertrain - Ignition

What it means

P032E means Knock/Combustion Vibration Sensor C Circuit Intermittent.

Where it lives

For P032E, the circuit described runs through the sensor. The description of P032E reports a fault at the sensor.

Check these first

An intermittent knock sensor C fault
A loose or corroded sensor C connector
Wiring chafing on the sensor C circuit
An engine mechanical fault causing knock
A faulty ECM input

What to do next

Monitor knock sensor C on a scan tool for dropouts
Inspect the sensor C connector and wiring for looseness
Wiggle test the harness while watching the signal
Scan for engine knock under load
Replace knock sensor C if it drops out
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.