P0326 on Kia
Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)
P0326 on Kia vehicles indicates knock sensor 1 circuit range/performance (bank 1 or single sensor). Au7o has documented this code across 1 Kia model — most commonly on K5. 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.
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 Kia by Model
Kia K5(1 issue)
- Theta II Engine Knock Sensor Issues and Knock-Related Concerns2021-2025
The 2.5L Theta II engine in certain K5 models has experienced knock sensor faults and engine knock concerns. The knock sensor may trigger false positives or fail to detect actual detonation, causing the ECU to either retard timing unnecessarily (reducing power) or fail to protect against harmful knock. Kia issued a software update to improve knock detection logic, but some owners report persistent issues after the update.
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View P0326 across all makes →Frequently Asked Questions
What does P0326 mean on Kia?▼
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 Kia specifically, this code is documented across 1 model.
What causes P0326 on Kia vehicles?▼
Common causes on Kia: 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 Kia?▼
Repair costs vary widely depending on the root cause and specific Kia model.
Which Kia models have P0326 documented?▼
Au7o has documented P0326 on 1 Kia model: K5.