PeachParts Mercedes-Benz Forum
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PeachParts Mercedes-Benz Forum (http://www.peachparts.com/shopforum/)
-   Tech Help (http://www.peachparts.com/shopforum/tech-help/)
-   -   HFM Code 77 (CO potentiometer Input short to positive) (http://www.peachparts.com/shopforum/tech-help/232049-hfm-code-77-co-potentiometer-input-short-positive.html)

PhantomLord 09-14-2008 11:07 AM
Vehicle Version Recognition
 
Did some tests this weekend, disconnecting/replacing O2 Sensor has no effect, still error code is 77.

Looks like I need to do "Vehicle Version Recognition", I think my vehicle is being recognized as 'NO TWC' where as it should have been 'TWC'. So 'NO TWC' map has been loaded by ECM :confused:

How can I do "Vehicle Version Recognition" without HHT?

Thank You

PhantomLord 09-16-2008 03:13 AM
bump!

Is there anyway we can do "Vehicle Version Recognition" without HHT. Anyone?

Thank You

PhantomLord 10-07-2008 11:45 AM
Update...
 
The problem was ECU/ECM was coded as without KAT, whereas my car has KAT. Coded it back as with code for KAT version and error vanished.


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