P1326Manufacturer-specific code

P1326 Code: Engine Knock Detection System (Hyundai and Kia, KSDS)

On Hyundai and Kia, the P1326 code means the engine knock detection system (KSDS) found vibration typical of internal wear. Power is limited. Do not keep driving if you hear knocking, and take the vehicle to the dealer.

Severity
Critical
Can I keep driving?
No, stop and have it checked
Estimated cost
$0 to $7,000
Difficulty
Hard
System
Ignition and Misfires
Applies to
Depends on the manufacturer

Common in: Hyundai, Kia

Updated Reviewed by Renzo Chacca

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What the P1326 code means

P1326 is a manufacturer-specific code: the 1 in the second position means each automaker defines what it stands for, not the generic standard. The most widespread definition is the one used by Hyundai and Kia. If your vehicle is another brand, confirm the code text with a scan tool that supports that manufacturer.

ManufacturerMeaning of P1326
Hyundai and KiaEngine knock detection system (KSDS)

On many Theta II engines (2.0 and 2.4) and some others, Hyundai and Kia installed a program (KSDS) that uses the knock sensor to detect vibrations typical of connecting rod bearing wear.

When it detects those vibrations, it stores the P1326 code and limits power to protect the engine. It is a warning of possible internal damage, which the manufacturer handles within its service campaigns.

Before you repair anything, confirm the make, model, year and engine. With manufacturer codes, the same number can change even between engines from the same brand.

P1326 code symptoms

  • Check engine light on or flashing.
  • Limited power.
  • Metallic knocking from the engine.

Likely causes of the P1326 code

  1. Worn connecting rod bearings. This is the condition the system is built to detect.
  2. Low oil level. Check the level, condition and viscosity.
  3. Knock sensor. Uncommon.

How to diagnose the P1326 code step by step

  1. Stop driving if you hear knocking.
  2. Check the oil level.
  3. Go to the dealer for the campaign inspection.

How to fix the P1326 code

  • Follow the manufacturer procedure: inspection and, if needed, repair or engine replacement.
  • After the work, the P1326 code should be cleared by the shop and rechecked on a test drive.

Technical reference data

  • The KSDS program was installed as a software update on several models.
  • P1xxx codes are manufacturer-specific: confirm the definition with a scan tool that supports your brand.
  • Values are approximate: check the manufacturer data for your vehicle.

Brand-specific notes

Ask the dealer whether your vehicle has engine service campaigns or an extended warranty.

P1326 on Hyundai

Common on the Hyundai Sonata, Tucson and Santa Fe.

P1326 on Kia

Common on the Kia Optima, Sportage and Sorento.

Frequently asked questions about P1326

What does the P1326 code mean on a Hyundai or Kia?
It means the engine knock detection system (KSDS) found vibration typical of internal wear. Power is limited to protect the engine.
Does P1326 mean the same thing on every brand?
No. It is a manufacturer code, and on other brands it may not exist or it may mean something else.
Can I drive with a P1326 code?
No. If you hear knocking, shut the engine off and contact the dealer. Driving on worn bearings can destroy the engine.
Is it covered by the warranty?
Many models have a service campaign or an extended warranty for this problem. Check with the dealer using your vehicle identification number.
How much does it cost to fix P1326?
On a Hyundai or Kia the cost runs from about $0 to $7,000. It can cost nothing under a campaign or warranty, and an engine replacement is the expensive end.
What is the most common cause of P1326?
Wear in the connecting rod bearings, which is exactly what the system is designed to detect. Low oil is the first thing to rule out.

Related codes

Questions about the P1326 code

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