P0326 Code with ringing noise in engine - what causes it?

Question

I have a ringing noise from the engine, especially when pressing the gas pedal very hard. The P0326 code also came up a couple times with check engine lit.

Answer 1

P0326 Knock sensor circuit range performance

Check this TSB out see if there is also a EVAP code that is set with it, This is only a partial copy

GROUP
FUEL SYSTEM

DATE
JUNE 2015

NUMBER
15-FL-003

MODEL(S)
ACCENT (RB)
VELOSTER (FS)

SUBJECT:
ECU UPDATE - 2012-2013MY RB/FS 1.6L GDI DTC P0326/P0441 OR SPARK KNOCK NOISE

Description:

This bulletin provides information related to an ECM (Engine Control Module) software update for certain 2012~2013MY ACCENT(RB) and VELOSTER(FS) 1.6L GDI vehicles that may experience either of the following:

^	Check engine light for DTC P0326 - Knock Sensor 1 Circuit Range/Performance (Bank 1), or
^	Spark knock noise on heavy acceleration in warm ambient temperatures, or
^	Check engine light for DTC P0441 - Canister Purge Valve (CPV) - Incorrect CPV Flow

Applicable Vehicle: Certain 2012-2013MY Accent (RB) and Veloster (FS) with 1.6L GDI engines

Comments

Thank you so much, Reynaldo. I believe that the issue is "Spark knock noise on heavy acceleration in warm ambient temperatures" as the noise occurs only under those conditions. The dealer mentioned to me that a cleaning of the fuel system is mandatory after 50k, as these engines are "famous for having problems with the injection system" - their words, not mine. I've also just found that this problem can be caused by "an accumulation of carbon deposits in the combustion chambers, on piston tops and valves can increase compression to the point where it exceeds fuel octane rating." More info here: http://www.onestopauto.com/What-causes-spark-knock.html

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Thank you that really good, It almost that time to get the fuel injector cleaner off the shelf. With todays Chevy engine, carbon build up is the more of a cause for misfire in the intake side. Thanks again