The Lemon IndexOn Hyundai and Kia engines, the knock sensor detection system picked up vibration that can point to wearing connecting rod bearings.
Stop and fix now. Don't put it off. This can affect safety, stall the car or cause expensive damage.
Early connecting rod bearing wear. Then: faulty knock sensor or wiring; software (KSDS update).
Owners named P1326 in 403 complaints to the U.S. government, most often on the Kia Optima.
Models that report it most
Complaints that name P1326, by model. Raw counts, not a failure rate: popular models get more complaints. Tap a model for its years, mileage and what owners say fixed it.
P1326 by model: P1326 Kia Optima (92) · P1326 Hyundai Sonata (90) · P1326 Hyundai Tucson (53) · P1326 Hyundai Santa Fe (52) · P1326 Kia Soul (38) · P1326 Kia Sorento (31) · P1326 Kia Sportage (22) · P1326 Kia Forte (10)
Years owners report it on most: 2016 Hyundai Sonata · 2020 Kia Optima · 2015 Hyundai Sonata · 2017 Hyundai Santa Fe · 2016 Kia Optima · 2015 Kia Optima
The details
What P1326 means
On Hyundai and Kia engines, the knock sensor detection system picked up vibration that can point to wearing connecting rod bearings. The car may go into limp mode. Owners are usually told to see a dealer, because this system was added during the brands' engine bearing campaigns.
This meaning applies to Hyundai, Kia. On other makes P1326 can mean something different.
Can I drive with P1326?
Stop and fix now. Don't put it off. This can affect safety, stall the car or cause expensive damage.
59% of the owner complaints that name P1326 also say the car rattles or knocks. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P1326
- Early connecting rod bearing wear
- Faulty knock sensor or wiring
- Software (KSDS update)
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Rattles or knocks: 59% of complaints
- Loses power or goes into limp mode: 45% of complaints
- Stalls or shuts off: 19% of complaints
- Uses or leaks oil: 11% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P1326 most
2016 Hyundai Sonata (20), 2020 Kia Optima (18), 2015 Hyundai Sonata (17), 2017 Hyundai Santa Fe (16), 2016 Kia Optima (15), 2015 Kia Optima (13).
Related codes
Quick answers
What does P1326 mean?
Knock Sensor Detection System (KSDS). On Hyundai and Kia engines, the knock sensor detection system picked up vibration that can point to wearing connecting rod bearings. The car may go into limp mode. Owners are usually told to see a dealer, because this system was added during the brands' engine bearing campaigns.
Can I drive with P1326?
Stop and fix now. Don't put it off. This can affect safety, stall the car or cause expensive damage.
What causes P1326?
Early connecting rod bearing wear; Faulty knock sensor or wiring; Software (KSDS update).
Counts: NHTSA owner complaints whose text names P1326. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.