P0406

Invalid Diagnostic Trouble Code

This vehicle does NOT generate this Trouble Code.

Alldata Editor Note: There is one in particular after market Scantool that still has not been updated and generates these and other Invalid DTC codes.

We've talked with numerous Alldata users, and they've told us that the work-around is to use the DTC description, and find a code that matches it. A number of our users have used Code P1406 (close match to P406) when the description matches an EGR Pintle Problem.

Our suggestion is:
1. If you have a second Scantool in the shop from a different manufacturer, it will probably read the Datastream correctly and generate a proper code.
If you don't have access to a second Scantool,

2. Call you Scantool manufacturer and let them advise you on a proper course of action.