Code P1326 – Knock Sensor Detection System

What are the possible causes of DTC P1326?

NOTE: The listed causes may not be a complete list of all potential issues and there may be other causes.

  • Faulty knock sensor
  • Knock sensor wiring harness is open or short-circuited
  • Poor electrical connection in the knock sensor circuit
  • Engine mechanical problem
  • Reprogram the Engine Control Module (ECM)

How to repair DTC P1326?

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What are the possible symptoms of code P1326?

  • Check Engine Light on (or Service Engine Soon warning light)

What does code P1326 mean?

The Knock Sensor Detection System (KSDS) detects vibrations indicating the onset of excessive connecting rod bearing wear. It is designed to alert the driver at an early stage of bearing wear before serious engine damage occurs, including engine failure. If vibrations caused by bearing wear begin to occur, the Malfunction Indicator Lamp (MIL) will flash continuously and the vehicle will be placed in Limp Home Mode. This will further reduce engine damage and ensure vehicle occupants are not exposed to the risk of more severe engine failure. At this point, the specific KSDS diagnostic trouble code (DTC) P1326 will be recorded in the ECU. The vehicle may continue to operate for a limited time in Limp Home Mode, but it will accelerate slowly and have a reduced maximum speed. Additionally, engine speed will be limited to approximately 1,800-2,000 RPM.

P1326 Acura Code – Ignition Control Module Combustion Quality Input Signal

What are the possible causes of DTC P1326 Acura?

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

  • Faulty Ignition Control Module (ICM)
  • Ignition Control Module (ICM) harness is open or shorted
  • Poor electrical connection in the Ignition Control Module (ICM) circuit

How to repair DTC P1326 Acura?

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What are the possible symptoms of Acura P1326 code?

  • Check Engine Light On (or Service Engine Soon Warning Light)

What does Acura P1326 code mean?

The Engine Control Module (ECM) monitors the Ignition Control Module (ICM). The ECM sets the OBDII code when the Ignition Control Module (ICM) does not meet factory specifications.

P1326 Code Audi – Cylinder 2 Knock Control Limit Reached

What are the possible causes of DTC P1326 Audi?

NOTE: The causes listed may not be a complete list of all potential issues and there may be other causes.

  • Low fuel level or fuel quality
  • Mass Air Flow (MAF) sensor failure
  • Low fuel pressure
  • Abnormal engine noise or faulty knock sensor
  • Faulty knock sensor
  • Knock sensor wiring harness is open or short-circuited
  • Poor electrical connection in the knock sensor circuit

How to fix DTC P1326 Audi?

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What are the possible symptoms of Audi P1326 code?

  • Check engine light on (or engine maintenance warning light soon)

What does Audi P1326 code mean?

The Engine Control Module (ECM) monitors cylinder 2 knock. The ECM sets the Diagnostic Trouble Code (DTC) when cylinder 2 knock does not meet factory specifications.

P1326 Code Honda – Ignition Control Module Combustion Quality Input Signal

What are the possible causes of Honda DTC P1326?

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

  • Faulty ignition control module (ICM)
  • Ignition control module (ICM) harness is open or shorted
  • Poor electrical connection in ignition control module (ICM) circuit

How to repair Honda DTC P1326?

Check 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 pins.

What are the possible symptoms of Honda P1326 code?

  • Check engine light on (or service engine soon warning light)

What does Honda P1326 code mean?

The engine control module (ECM) monitors the ignition control module (ICM). The ECM sets the OBDII code when the ignition control module (ICM) does not meet factory specifications.

P1326 Code Hyundai – Knock Sensor Detection System

What are the possible causes of Hyundai DTC P1326?

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

  • Faulty knock sensor
  • Knock sensor wiring harness is open or short-circuited
  • Poor electrical connection in the knock sensor circuit
  • Engine mechanical problem
  • Reprogram the Engine Control Module (ECM)

Hyundai P1326 Code Technical Notes

There is a factory service campaign to inspect the vehicle and install a wiring harness extension or replacement engine based on the inspection results.

How to fix Hyundai DTC P1326?

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What are the possible symptoms of Hyundai P1326 code?

  • Check Engine Light on (or soon-to-be engine maintenance warning light)

What does Hyundai P1326 code mean?

The Knock Sensor Detection System (KSDS) detects vibrations indicating the onset of excessive connecting rod bearing wear. It is designed to alert the driver at an early stage of bearing wear before serious engine damage occurs, including engine failure. If vibrations caused by bearing wear begin to occur, the Malfunction Indicator Lamp (MIL) will flash continuously and the vehicle will be placed in Limp Home mode. This will further reduce engine damage and ensure vehicle occupants are not exposed to the risk of more severe engine failure. At this point, the Diagnostic Trouble Code (DTC) P1326, specific to KSDS, will be recorded in the ECU. The vehicle may continue to operate for a limited time in Limp Home mode, but it will accelerate slowly and have reduced maximum speed. Additionally, engine RPM will be limited to approximately 1,800-2,000 RPM.

P1326 Isuzu Code – Ignition Control Module Combustion Quality Input Signal

What are the possible causes of DTC P1326 Isuzu?

NOTE: The causes listed may not be a complete list of all potential problems and there may be other causes.

  • Faulty Ignition Control Module (ICM)
  • Ignition Control Module (ICM) harness is open or shorted
  • Poor electrical connection in the Ignition Control Module (ICM) circuit

How to repair DTC P1326 Isuzu?

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What are the possible symptoms of Isuzu code P1326?

  • Check Engine Light on (or Service Engine Soon warning light)

What does Isuzu code P1326 mean?

The Engine Control Module (ECM) monitors the Ignition Control Module (ICM). The ECM sets the OBDII code when the Ignition Control Module (ICM) does not meet factory specifications.

P1326 Code KIA – Knock Sensor Detection System

What are the possible causes of DTC P1326 KIA?

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

  • Faulty knock sensor
  • Knock sensor harness is open or short-circuited
  • Poor electrical connection of the knock sensor circuit
  • Engine mechanical problem
  • Reprogram the Engine Control Module (ECM)

How to repair DTC P1326 KIA?

Check the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What are the possible symptoms of KIA P1326 code?

  • Check Engine Light on (or soon-to-be-on engine service warning light)

What does KIA P1326 code mean?

The Knock Sensor Detection System (KSDS) detects vibrations indicating the onset of excessive connecting rod bearing wear. It is designed to alert the driver at an early stage of bearing wear before serious engine damage occurs, including engine seizure. If vibrations caused by bearing wear begin to occur, the Malfunction Indicator Lamp (MIL) will flash continuously and the vehicle will be placed in Limp Home Mode. This will further reduce engine damage and ensure vehicle occupants are not exposed to the risk of more severe engine failure. At this point, the Diagnostic Trouble Code (DTC) P1326, specific to KSDS, will be recorded in the ECU. The vehicle may continue to operate for a limited time in Limp Home Mode, but it will accelerate slowly and have a reduced maximum speed. Additionally, the engine speed will be limited to approximately 1,800-2,000 RPM.

P1326 Volkswagen Code – Knock Control Limit for Cylinder 2 Reached

What are the possible causes of DTC P1326 Volkswagen?

NOTE: The listed causes may not be a complete list of all potential problems, and there may be other causes.

  • Low fuel level or fuel quality
  • Mass Air Flow (MAF) sensor failure
  • Low fuel pressure
  • Abnormal engine noise or faulty knock sensor
  • Faulty knock sensor
  • Knock sensor wiring harness is open or short-circuited
  • Poor electrical connection in the knock sensor circuit

How to repair DTC P1326 Volkswagen?

Check the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What are the possible symptoms of Volkswagen P1326 code?

  • Check Engine Light on (or soon-to-be-on Engine Maintenance Warning Light)

What does Volkswagen P1326 code mean?

The Engine Control Module (ECM) monitors cylinder 2 knock. The ECM sets the Diagnostic Trouble Code (DTC) when cylinder 2 knock does not meet factory specifications.

Code P1327 – Low Input from Knock Sensor 2

📘 Meaning of Code P1327

The code P1327 indicates that the engine control module (ECM) has detected a malfunction in the knock sensor.
This sensor is responsible for detecting abnormal engine vibrations caused by detonation (knocking) so that the ECM can adjust the ignition timing to protect the engine.

⚠️ Possible Symptoms

  • 🚨 Check Engine light or service engine soon light illuminated
  • 🚗 Engine slowdown or reduced performance
  • 🛑 Limp mode (power limitation to protect the engine)
  • ⛽ Increased fuel consumption
  • 🔊 Knocking sounds or unusual noises

❌ Possible Causes

Potential Cause Description
🎯 Faulty knock sensor Sensor no longer transmitting correct data
🔌 Damaged sensor wiring Short circuit, cut wire, melted wire
⚡ Poor connection Corroded, loose, or broken pins at sensor connector
🧠 Faulty ECM (rare) Incorrect reading or error in signal processing

🛠️ Repair Procedure

  1. ✅ Visual inspection
    • Locate the knock sensor (often on the engine block).
    • Check the wiring harness: no cut, chafed, or burned wires.
    • Inspect the connector: look for bent, broken, or corroded pins.
  2. 🔌 Sensor test
    • Disconnect the sensor.
    • Measure resistance with a multimeter between sensor pins (typical values: between 500 Ω and 620 kΩ, depending on type).
    • If no continuity or if value is very high: replace sensor.
  3. 📏 Signal test
    • With an oscilloscope (or advanced diagnostic tool), measure the signal sent during vibrations.
    • If no signal is detected even when lightly tapping the engine → sensor faulty.
  4. 🔁 Replacement
    • If sensor or wiring is at fault → replace knock sensor and/or repair wiring harness.
    • Clear the code with an OBD-II scanner and test again.

✅ Quick Summary

Step Action
👁️ Inspection Wiring + connector
📏 Resistance test With multimeter
⚡ Signal check (optional) with oscilloscope or professional tool
🔁 Repair Sensor / wiring
🧹 Clear code After repair

P1327 Code Audi – Cylinder 3 Knock Control Limit Reached

What are the possible causes of DTC P1327 Audi?

NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.

  • Low fuel level or fuel quality
  • Mass Air Flow (MAF) sensor failure
  • Low fuel pressure
  • Abnormal engine noise or faulty knock sensor
  • Faulty knock sensor
  • Knock sensor wiring harness open or short circuit
  • Poor electrical connection in knock sensor circuit

How to repair DTC P1327 Audi?

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What are the possible symptoms of Audi P1327 code?

  • Check Engine Light on (or soon to be on Engine Maintenance Warning Light)

What does Audi P1327 code mean?

The Engine Control Module (ECM) monitors the Mass Air Flow (MAF) sensor. The ECM sets the OBDII code when the Mass Air Flow (MAF) sensor does not meet factory specifications.