Possible Causes

DTC is set when purge flow switching valve VSV is on and vapor density of air flowing from EVAP VSV into the intake manifold is high. Possible causes are:

• Defective fuel tank.
• Defective HO2S.
• Fuel system malfunction.
• Defective VVT system.
• Ignition system malfunction.
• Defective MAF meter.
• Defective ECM.