P0326 on Hyundai
Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)
P0326 on Hyundai vehicles indicates knock sensor 1 circuit range/performance (bank 1 or single sensor). Au7o has documented this code across 1 Hyundai model — most commonly on Veloster. P0326 is a generic powertrain code indicating the engine computer detected that the knock sensor 1 (bank 1) signal is outside its expected range or performing improperly. The knock sensor listens for engine 'knock' (pre-ignition/detonation) so the PCM can retard timing to protect the engine; an out-of-range signal means the computer can no longer rely on it. This usually causes reduced performance and fuel economy and, if knock goes undetected, possible long-term engine wear. Typical repair costs on Hyundai range from $200 to $1,200, depending on the specific model and root cause.
Common Causes of P0326
- •Faulty knock sensor
- •Damaged knock sensor wiring or connector
- •Corrosion or poor contact at the sensor
- •Engine mechanical noise mimicking knock
- •Loose sensor mounting / incorrect torque
- •Wiring shorted or open to the PCM
- •PCM fault (rare)
P0326 on Hyundai by Model
Hyundai Veloster(1 issue)
- Knock Sensor / Engine Protection Logic Triggering Reduced Power and Check-Engine Light on 2.0L Models2019-2021
Some naturally aspirated 2.0L Veloster owners report check-engine lights, rough running, and reduced-power behavior tied to knock sensor activity or engine protection logic. While not as notorious as older Hyundai engine campaigns, the symptom pattern is documented enough to appear in owner complaints and service discussions: the car may suddenly feel flat, limit RPM, or illuminate the MIL even when no obvious mechanical noise is present. In some cases the issue is sensor-related; in others it requires ruling out genuine detonation, wiring faults, or software sensitivity.
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View P0326 across all makes →Frequently Asked Questions
What does P0326 mean on Hyundai?▼
P0326 stands for "Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)." P0326 is a generic powertrain code indicating the engine computer detected that the knock sensor 1 (bank 1) signal is outside its expected range or performing improperly. The knock sensor listens for engine 'knock' (pre-ignition/detonation) so the PCM can retard timing to protect the engine; an out-of-range signal means the computer can no longer rely on it. This usually causes reduced performance and fuel economy and, if knock goes undetected, possible long-term engine wear. On Hyundai specifically, this code is documented across 1 model.
What causes P0326 on Hyundai vehicles?▼
Common causes on Hyundai: Faulty knock sensor, Damaged knock sensor wiring or connector, Corrosion or poor contact at the sensor, Engine mechanical noise mimicking knock, Loose sensor mounting / incorrect torque. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0326 on a Hyundai?▼
Repair costs on Hyundai range from $200 to $1,200, depending on the specific model and root cause.
Which Hyundai models have P0326 documented?▼
Au7o has documented P0326 on 1 Hyundai model: Veloster.