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• If the failure is not found on the second Trip, the Pending DTC is erased
from the computer’s memory.
The MIL will stay lit for both Type “A” and Type “B” codes until one of the
following conditions occurs:
• If the conditions that caused the MIL to light are no longer present for the
next three trips in a row, the computer automatically turns the MIL “O” if no
other emissions-related faults are present. However, the DTCs remain in
the computer’s memory as a history code for 40 warm-up cycles (80 warm-
up cycles for fuel and misre faults). The DTCs are automatically erased if
the fault that caused them to be set is not detected again during that period.
• Misfire and fuel system faults require three trips with “similar conditions”
before the MIL is turned “O.” These are trips where the engine load, RPM
and temperature are similar to the conditions present when the fault was
rst found.
Note: Aer the MIL has been turned o, DTCs and Freeze Frame data stay
in the computer’s memory.
• Erasing the DTCs from the computer’s memory can also turn o the MIL. If
a Diagnostic Tool or Scan Tool is used to erase the codes, Freeze Frame
data will also be erased.
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