See also:

Three-way catalytic converter
• Keep your engine properly tuned. Certain engine malfunctions, particularly involving the electrical, fuel or distributor ignition systems, may cause unusually high threeway catalytic convert ...

Oil volume
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Parking the vehicle in warm weather
If your vehicle has been parked in the sun in warm weather, opening the windows and moonroof for several minutes before driving will help release the warm air from the passenger compartment. When ...