What does code P1326 mean?

P1326: Knock Sensor Detection System - Connecting Rod Bearing Wear (Hyundai/Kia)

Severity: high

What it means: Hyundai's Knock Sensor Detection System (KSDS) software has picked up engine vibration patterns that point to abnormal connecting rod bearing wear. Hyundai logs it as P1326 (P132600).

Safe to drive? No. The check-engine light blinks, a chime sounds and the engine goes into a reduced-power protection mode. Bearing wear can lead to engine seizure, so have it inspected right away.

Common symptoms

Blinking check-engine light with a chime
Reduced power (engine protection or limp mode)
Knocking noise from the engine

Likely causes, ranked

Connecting rod bearing wearShop
Low oil level or oil starvationShop
Knock sensor or wiring fault (less common)Shop

Vehicle-specific notes

2011–2019 Hyundai Sonata: Theta II 2.4L and 2.0T: Hyundai's KSDS campaign 953 adds the P1326 monitor. Its TXXI extension gives a lifetime warranty on the long block for rod bearing damage once KSDS is installed and P1326 sets. Also covers certain Santa Fe Sport, Santa Fe and Tucson models. Read the full answer · Source

Severity: High. Safe to drive? No. The check-engine light blinks, a chime sounds and the engine goes into a reduced-power protection mode. Bearing wear can lead to engine seizure, so have it inspected right away.

DIY or shop?

Dealer. Hyundai's extended warranty covers engine inspection and replacement for qualifying vehicles.

Before you replace parts

Don't keep driving with a blinking check-engine light. Check the oil level.
Have a Hyundai dealer read the code and check your VIN for campaign 953, T3G and the extended engine warranty.
Keep oil change records. They can help with warranty claims.

Safety / mechanic note

Verify with a mechanic. An engine that seizes can lose power suddenly in traffic. A code points to a circuit or system, not always a specific part.