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.