DTC P0406: EGR Valve Position Sensor Circuit High Voltage Turn the ignition switch ON (II). Check the EGR VLS in the DATA LIST with the HDS. Is 4.88 V or higher indicated?
YES | - | Go to Step 3 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EGR valve and the ECM/PCM.■
Turn the ignition switch OFF. Disconnect the EGR valve 6P connector. Turn the ignition switch ON (II). Measure voltage between EGR valve 6P connector terminals No. 2 and No. 3. Is there about 5 V?
YES | - | Go to Step 8 .
NO | - | Go to Step 7 .