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.

P1327 BMW Code – Knock Sensor 2 Low Input

What are the possible causes of DTC P1327 BMW?

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

How to repair DTC P1327 BMW?

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 BMW P1327 code?

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

What does BMW P1327 code mean?

The Engine Control Module (ECM) monitors the knock sensor. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the knock sensor does not meet factory specifications.

P1327 Code Fiat – Fuel Oil Solenoid Valve Switching Time

What are the possible causes of Fiat DTC P1327?

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

  • Low engine oil level
  • Contaminated engine oil
  • Incorrect oil filter
  • Insufficient oil pressure due to mechanical failure in the lubrication system
  • Faulty Variable Valve Actuator (VVA) assembly

How to repair Fiat DTC P1327?

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 Fiat code P1327?

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

What does Fiat code P1327 mean?

Multi-Air is an electronically controlled variable intake valve timing and lift system. Unlike conventional intake valve timing and lift systems that control all intake valves of the cylinders simultaneously and in the same proportion; Multi-Air, through the use of an electronically controlled hydraulic link between the camshaft and the intake valve, allows each intake valve to be controlled independently. Valve lift and timing can be adjusted continuously.
The Multi-Air valve system features a mechanical camshaft lobe acting on a hydraulic pump located between the intake camshaft lobe and the intake valve. The pump supplies pressurized oil to a two-way electro-hydraulic valve called the Variable Valve Actuator (VVA) solenoid. The VVA solenoid is electronically controlled during the specific intake cam lobe event by the Powertrain Control Module (PCM). During the event, the VVA solenoid is commanded to maintain oil pressure or to purge oil. The VVA solenoid is a normally open solenoid. The PCM provides 12 volts to close the solenoid. The position of the VVA solenoid determines the intake valve timing and lift. This change in valve action is similar to creating a change in the camshaft lobe profile affecting the lift and duration of the valve opening.
The Diagnostic Trouble Code (DTC) will be set when the PCM measures the time required to activate the VVA solenoid. When the PCM determines that the VVA solenoid activation time cannot be measured, a fault is set.

P1327 Code Hyundai – Electric Glow Plug Relay

What are the possible causes of DTC P1327 Hyundai?

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

  • Faulty glow plug relay
  • Glow plug relay harness is open or shorted
  • Poor electrical connection in the glow plug relay circuit

How to repair DTC P1327 Hyundai?

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 P1327 code?

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

What does Hyundai P1327 code mean?

The Engine Control Module (ECM) monitors the glow plug relay. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the glow plug relay does not meet factory specifications.

P1327 MINI Code – Knock Sensor 2 Low Input

What are the possible causes of DTC P1327 MINI?

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

  • Faulty knock sensor
  • Knock sensor wiring harness is open or short-circuited
  • Poor electrical connection in the knock sensor circuit

How to fix DTC P1327 MINI?

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 MINI P1327 code?

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

What does MINI P1327 code mean?

The Engine Control Module (ECM) monitors the knock sensor. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the knock sensor does not meet factory specifications.

P1327 Code Volkswagen – Knock Control Limit for Cylinder 3 Reached

What are the possible causes of DTC P1327 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 P1327 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 P1327 code?

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

What does Volkswagen P1327 code mean?

The Engine Control Module (ECM) monitors the knock sensor. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the knock sensor does not meet factory specifications.

Code P1328 – Knock Control Limit for Cylinder 4 Reached

What are the possible causes of DTC P1328?

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

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

How to repair DTC P1328?

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

What are the possible symptoms of code P1328?

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

What does code P1328 mean?

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

P1328 Audi Code – Cylinder 4 Knock Control Limit Reached

What are the possible causes of DTC P1328 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 is open or short-circuited
  • Poor electrical connection in the knock sensor circuit

How to repair DTC P1328 Audi?

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 Audi P1328 code?

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

What does Audi P1328 code mean?

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

P1328 BMW Code – Knock Sensor 2 High Input

What are the possible causes of DTC P1328 BMW?

NOTE: The causes listed 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

How to repair DTC P1328 BMW?

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 BMW P1328 code?

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

What does BMW P1328 code mean?

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