EGR valveIf the above fault with this error code is detected for this vehicle type, it may be caused by an implausible response voltage from the EGR valve.
The setpoint for this EGR valve as given in the mega macs information is 1.0V. The tolerance for this value is extremely low. If the voltage at the EGR valve is only slightly too high or too low, for instance by as little as 0.1V, it will set error code P1405.
You can install a software update from the manufacturer in the engine control module to enable the EGR valve to tolerate higher voltage deviations.
Important safety notice
The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
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