Conditions For Clearing MIL/DTC

WARNING: This page is about a different car, the 2003 Isuzu Axiom. However, it is still accessible from the selected car via links, so may be relevant.

PCM will turn the MIL OFF on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
A history DTC P1636 will clear after 40 consecutive trip cycles during which the warm up cycles have occurred without a fault.
DTC P1636 can be cleared using the TECH 2 CLEAR Info function or by disconnecting the PCM battery feed.