Engine-Codes - Generic - P1331

P1331 - Cylinder 7 Knock Control Limit Attained

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P1331 Possible Causes

  • Low fuel level or fuel quality
  • Mass Air Flow (MAF) Sensor failure
  • Low fuel pressure
  • Abnormal engine noise or failed Knock Sensor
  • Faulty Knock Sensor
  • Knock Sensor harness is open or shorted
  • Knock Sensor circuit poor electrical connection

How is the P1331 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P1331 code

Labor: 1.0

The cost to diagnose the P1331 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1331 Meaning

The Engine Control Module (ECM) monitors the Knock Sensor. The ECM sets the OBDII code when the Knock Sensor is not to factory specifications.

More Information

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Information for specific makes

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