Canada - Exhuast - Sulfur Odor/Smell From Exhaust

Bulletin
0594

Issue Date
2002-02-21

Market
Canada

Reference
EM-03-001

Model
All Models

Year Range
All Model Years

Component
EM, FU

Subject:
SULFUR ODOUR/SMELL FROM EXHAUST

Some owners of Lexus vehicles may experience a sulfur like or "rotten egg" odour from the exhaust system. High levels of sulphur in gasoline cause sulphur compounds to be deposited and burned off in the catalytic convertor during certain driving conditions. Sulfur is a natural component of crude oil from which gasoline is refined and the amount of sulfur can be decreased through the refining process. The amount of sulfur content in fuel sold in Canada can vary from Province to Province and varies considerably between gasoline brands.

On June 23, 1999, the federal government passed regulations limiting the amount of sulphur in gasoline. Starting in 2005, low-sulphur gasoline (that is gasoline with an average sulphur level of less than 30 ppm) is required throughout Canada. As an interim step, gasoline with an average sulphur level of not more than 150 ppm is required starting in 2002.

The implementation of the low-sulpur fuel requirement is not until January 2005. If customers are concerned about this issue they should contact Environment Canada, or their member of parliament.

APPLICABLE VEHICLES: All Models.

REPAIR PROCEDURE:
A sulfur odour emitted from the vehicle's tailpipe does not necessarily indicate that there is an issue with the engine's running condition, but is most likely directly related to the fuel. If the vehicle is exhibiting an excessive sulfur odour, the following checks should be performed:
- If the MIL light is ON, check for DTCs and repair as necessary.

If no trouble is found after performing the above check, recommend the customer try a different source of fuel.

Replacement of oxygen sensors, air/fuel ratio sensors or catalytic converters will not reduce the odour and will therefore not be considered warrantable.

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.