Anyone having this problem see below?

Question

At highway speed Knock sensor code returns PO 326. Already replaced sensor. 2013 Kia Soul

Answer 1

P0326 Knock sensor 1 circuit range performance

You already replace the knock sensor, and the code returns, The knock sensor should be from the dealer, and make sure that you have the ECM updated , this is a Campaign or Recall that the Kia has out, TSB # ENG124R4. The code that is included with this Recall list P0326 also with it Here a sample of the Recall TSB

SUBJECT:
ECM UPGRADE - RIO, SOUL MIL ON WITH DTC(S) P0456/P0461/P050A/P2188/P2192/P0128/P0326/P0441

*NOTICE This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area or by asterisks.*

*This bulletin provides information related to the ECM software upgrade for some 2012~2014MY Rio (UB), some 2012~2013 Soul (AM) and some 2014MY Soul (PS) vehicles, which may experience a malfunction indicator lamp (MIL) illuminated with the Electronic Control Module (ECM) system-related DTCs; P0456, P0461, P050A, P2188, P2192, P0128, P0326, P0441. To correct this condition, the ECM should be reprogrammed using the GDS download as described in this bulletin. Before performing this procedure for a specific DTC concern, verify the VIN and DTC fall within the production ranges, by consulting the AFFECTED VEHICLE PRODUCTION RANGE table. For confirmation that the latest reflash has been done to a vehicle you are working on, verify ROM ID using the tables in this TSB.*

P0456: Evaporative Emission System-Leak detected (very small leak)
P0461: Fuel Level Sensor Circuit Range/Performance P050A: Cold Start Idle Air Control System Performance
P2188: System too rich at idle (Bank 1)
P2192: System too rich at higher load (Bank 1)
P0128: Thermostat (Temp. below Thermostat Regulating Temp.)
P0326: Knock Sensor 1 Circuit Range/ Performance (Bank 1)
P0441: Evaporative Emission System Incorrect Purge Flow