DTC P0406: EGR Valve Position Sensor Circuit High Voltage

1. Turn the ignition switch ON (II).

1. 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.■

1. Turn the ignition switch OFF.

1. Disconnect the EGR valve 6P connector.

1. Turn the ignition switch ON (II).

1. 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 .