How to fix P0300 and P0302 error codes for Hyundai Accent 2008 ?
4 Answers
P0300 HYUNDAI - Random/Multiple Cylinder Misfire Detected- Possible causes - Faulty spark plug (s) - Faulty ignition coil (s) - Clogged or faulty fuel injector (s) - Intake air leak - Fuel injectors harness is open or shorted - Fuel Injectors circuit poor electrical connection - Ignition coils harness is open or shorted - Ignition coils circuit poor electrical connection - Insufficient cylinders compression - Incorrect fuel pressure.....There is a factory service bulletin for the following Hyundai models: Accent (MC) 2003-2006 SULEV Elantra (XD) 2004-2008 Tiburon 2.0L (GK) Tucson 2.0L (JM) Elantra (HD) Elantra Touring (FD) Genesis Coupe (BK) Sonata (NF) Santa Fe Sonata (NF) Santa Fe (CM) Azera (TG) Veracruz (EN) Entourage (EP), Genesis Coupe (BK) Genesis Sedan (BH)Genesis Sedan (BH) The bulletin provides information on how to inspect and diagnose problems related to the Oil Control Valve (OCV) used in Constant Variable Valve Timing (CVVT), if at any time the OCV is suspected as the caused of rough idling, poor acceleration, camshaft timing misalignment-related trouble codes, misfire-related trouble codes. Bulletin: Hyundai Constant Variable Valve Timing Oil Control Valve Inspection
Wow, that's a bunch of possible issues. Thanks a lot, Rowefast!
My p0300 code was easily repaired on a 2007 accent was replacing the battery. Output was 12.45 volts and weak with a load test.
GU1962RUJOEMAN answered 4 years ago
Start with basics. Do a cylinder balance test @ idle AND under load, determine cylinder(s) affected, ~ check compression, spark, fuel pressure and injector spray pattern IF NECESSARY!
