What code did you get?

How are you resetting the light?

Most likely you wasted your money on a new valve, when all that was
really needed was a cleaning of the EGR passages and EGR port on the
plenum.

Nirav

That was a waste of time and money. The valves never go bad. You need to
clean the passage in the inatke manifold.

At least the "diagnosis" was free and was worth exactly what you paid for
it..

.. to reset it by removing both battery cables and touching them together
Depending on source one reads, ½-24hrs batt cable off = ECU reset. My experience is ½hr is enough.

When batt cables are out
- theres no pwr supply as batt is disconnecte
- no benefit/harm positive cable touching gnd - any de-energized entit
- smaller entitities like electronic boards may be zapped if static discharge is created/released via clothing et
- be careful as the thick wires may want to bend back &connec

--
Wiikinki
www.cardomain.com/ride/748507/

Computer mem chips do.

OBDI -or- OBDII is just the name for the operatin system - supported by hw

Whatever, all maxima ECU's will zero registers (as most computers) when pwr is out, FSM tells also about this. On some systems this epends on 'backup pwr =condenser discharge time, how long time that is - after batt cable disconnect. Also the used memory chip type = hw structure defines this, not sw or general definitions like OBD

--
Wiikinki
www.cardomain.com/ride/748507/