Trouble code · Powertrain · Manufacturer-specific

P1326 Knock Sensor Detection System (Hyundai/Kia)

A Hyundai and Kia code from the Knock Sensor Detection System, software that listens for the knocking that can come from engine bearing wear. It's an early warning of possible serious engine damage.

Safe to drive?
Get it checked now
Limit driving until it's diagnosed
Scanner you need
Any OBD2 scanner
Even a basic code reader shows it
NHTSA complaints quoting it
348
Vehicle complaints, 2015–2025

Common causes

  • Possible connecting-rod bearing wear on affected Hyundai and Kia engines
  • Less often, a knock sensor or wiring fault

Symptoms

  • Check engine light (often flashing)
  • The engine may go into a reduced-power mode
  • Sometimes a knocking noise

Can I drive with it?

Take it seriously: reduce driving and contact a Hyundai or Kia dealer promptly. Many affected engines were covered by recalls or extended-warranty programs – check your VIN on NHTSA's recall lookup.

Tip: In the 2015–2025 NHTSA complaints, every complaint quoting P1326 came from a Kia or Hyundai owner.

Which scanner reads it?

Any OBD2 scanner can show the code, but cheaper ones may not know what it means because it's manufacturer-specific (a P1 code).

Budget tools like the ANCEL AD310 read it; tools with live data and graphing – like the BlueDriver or OBDLink MX+ – help you find the cause. Not sure which fits you? Try the Find My Scanner quiz.

In the data

Of the vehicle complaints owners filed with NHTSA from 2015 to 2025, 348 quote P1326 – most often from Kia, Hyundai owners. Complaints lean toward serious problems, so treat this as a sign of how often the code turns up in real reports, not how often cars get it.

Both sources are compared on the Trends page.

General information to help you understand a code – not a diagnosis. Your car’s service information or a qualified mechanic has the final word. See how we research.