This bulletin provides information related to the Oil Control Valve (OCV) used in Constant Variable Valve Timing (CVVT). If at any time the OCV is suspected as a cause of rough idling, poor acceleration, camshaft timing misalignment-related trouble codes, misfire-related trouble codes, etc, on a Kia vehicle equipped with Continuously Variable Valve Timing (CVVT) system, be sure to perform the OCV inspection procedure below before replacement.
If the OCV operates normally, inspect for other engine malfunctions. Do not replace the OCV.
Make sure the oil filter is OE; aftermarket oil filter flow rates differ and may affect the CVVT system performance.
File Under: Engine
EngineVehicle ModelOCV supplier
Alpha 1.6L/Gamma 1.6LRio (JB), Soul (AM)Denso
Theta 2.0L, 2.4LOptima (MG), Rondo (UN), Forte (TD)Denso
Beta 2.0LSpectra (LD), Sportage (KM)Siemens
Mu 2.7LOptima (MG), Sedona (VQ)Delphi
Lambda 3.3L/3.8LAmanti (GH), Borrego (HM), Sedona (VQ), Sorento (BL)Delphi
Tau 4.6LMohave/Borrego (HM)Denso
Related Diagnostic Trouble Codes
P0011 'A' camshaft position - Timing over-advanced or System performance (Bank 1)
P0012 'A' camshaft position - Timing over-retarded (Bank 1)
P0014 'B' camshaft position - Timing over-advanced or System performance (Bank 1)
P0015 'B' camshaft position - Timing over-retarded (Bank 1)
P0016 Crankshaft position-Camshaft position correlation (Bank1 Sensor A)
P0018 Crankshaft position-Camshaft position correlation (Bank2 Sensor A)
P0021 'A' camshaft position - Timing over-advanced or System performance (Bank 2)
P0022 'A' camshaft position - Timing over-retarded (Bank 2)
P0300 Random/Multiple cylinder misfire detected
Measure the resistance between the OCV power and ground terminals.
RESISTANCE REFERENCE CHART
Measured Resistance (68 F)Action to Take
Denso (6.9 7.9?)
Delphi (6.7 7.7?)
Siemens (6.8 8.0?)Check if the OCV operates normally by providing 12V power. (See Step 2.)
InfinityOpen circuit? Replace the OCV.
Abnormally low or Zero resistanceShort circuit? Replace the OCV.
Check if the OCV operates normally by providing 12V power supply as shown. Do not apply voltage for longer than 5 seconds at a time; Do not overheat OCV windings.
NOTE:Careful attention is necessary to avoid short circuit when providing the OCV with 12V power because the spacing between the OCV power and ground terminals is very narrow.
When 12V power is provided to the OCV, the OCV must move forward as shown in the right picture.
Maximum retarded valve timing condition (12V not provided) Normally Open
Maximum advanced valve timing condition (12V provided) Closed when energized.
If the OCV does not move forward, examine carefully for a foreign object like an aluminum chip or flashing which maybe jammed inside OCV passage.
Blow out the foreign object using compressed air, reuse the OCV and then verify that the fault is corrected.
The OCV can be replaced for the following conditions:
Resistance out of specification
Valve does not move when voltage is applied
Foreign debris cannot be removed from the OCV
WARRANTY CLAIM INFORMATION
Use Normal Warranty Procedures which includes diagnostic time
Thursday, July 7th, 2011 AT 9:32 PM