tC L4-2.4L (2AZ-FE) (2005)
Air/Fuel Mixture: Testing and Inspection
INSPECT CO/HC
HINT: The ECM properly controls the CO/HC concentration in the emission gas.
a. Start the engine.
b. Run the engine at 2,500 rpm for approximately 180 seconds.
c. Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe while idling.
d. Check the CO/HC concentration while idling and/or at 2,500 rpm.
If the CO/HC concentration does not comply with the regulations, troubleshoot in the order given.
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Check the heated oxygen sensor operation.
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See the table for possible causes, then inspect the applicable parts and repair them if necessary.