Question about 2004 Hyundai Elantra
The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the exhaust camshaft. There is no variation in valve timing of the exhaust cam because the exhaust camshaft is driven by the timing belt. The timing of the intake cam is varied by the relative operation the CVVT vane to the housing. This system helps the engine decrease exhaust gases and increase engine power and fuel economy by changing the valve open/close timing of the intake camshaft. The deviation of the camshaft position from the target point is evaluated during stable driving condition. The PCM accumulates this deviation for a certain period and sets DTC P0010 when the accumulated deviation is too high. The target camshaft position is a predetermineded value depending on engine speed and throttle angle communicated to the PCM. The MOST FREQUENT CAUSE is DIRTY OIL. The NEXT most frequent cause is restriction/obstruction of OIL FLOW to the CVVT unit (oil control valve supplies this). Remove this valve & inspect it for aluminium flashing (bits of metal which might be interferring with the valve's operation). We use Z-MAX treatment to solve this problem at our service center (after changing oil & filter (genuine Hyundai Oil Filter).
Posted on Jun 17, 2009
Tips for a great answer:
Dec 12, 2014 | 2001 Hyundai Elantra GLS
Nov 27, 2013 | 2000 Toyota Camry
Thermostat Rationality Test
Check the operation of the thermostat (it may be stuck open).ECT Sensor is contaminated, damaged or it has failed.Inspect for low coolant level or for an incorrect coolant mixture.Trouble Code: P0440
EVAP Purge System Fault
EVAP purge valve vacuum supply is leaking or clogged.EVAP purge valve is stuck closed.EVAP purge solenoid has failed.NVLD assembly (leak detection) is damaged or has failed.NVLD switch circuit is open or the NVLD switch has failed.Ground circuit is open.PCM has failed.Trouble Code: P0456
EVAP Small Leak (0.020") Detected
.EVAP fuel tank or canister vapor hoses leaking or damaged.EVAP system component leaking, fuel cap loose or missing.Leak detection pump damaged or leaking.Trouble Code: P0622
Generator Field Control Circuit Malfunction
Generator field control circuit is open or is shorted to ground.Generator field control circuit is shorted to system power (B+).Generator field ground circuit is open.Generator is damaged or PCM has failed.PCM has failed.Here are the codes and causes.
Nov 25, 2012 | 2002 Dodge Intrepid
Oct 14, 2012 | 2004 Ford Freestar
Oct 02, 2012 | 2004 Dodge Stratus
Feb 23, 2011 | 2004 Suzuki Grand Vitara
Apr 25, 2010 | 2004 Hyundai Elantra
Feb 06, 2010 | 2004 Chevrolet Avalanche
1,983 people viewed this question
Usually answered in minutes!