Emission Inspection And Maintenance (I/M) Programs - Lexus ES 300h User Manual

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7-2. Maintenance
Emission inspection and maintenance (I/M)
programs
Some states have vehicle emission inspection programs which include OBD
(On Board Diagnostics) checks. The OBD system monitors the operation of
the emission control system.
If the malfunction indicator lamp comes on
The OBD system determines that a problem exists somewhere in the emission
control system. Your vehicle may not pass the I/M test and may need to be
repaired. Contact your Lexus dealer to service the vehicle.
Your vehicle may not pass the I/M test in the following situations:
When the 12-volt battery is disconnected or discharged
●
Readiness codes that are set during ordinary driving are erased.
Also, depending on your driving habits, the readiness codes may not be com-
pletely set.
When the fuel tank cap is loose
●
The malfunction indicator lamp comes on indicating a temporary malfunction
and your vehicle may not pass the I/M test.
When the malfunction indicator lamp still remains on after several driv-
ing trips
The error code in the OBD system will not be cleared unless the vehicle is driven
40 or more times.
If your vehicle does not pass the I/M test
Contact your Lexus dealer to prepare the vehicle for re-testing.
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