Diagnostic Aids
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The catalyst test may abort due to a change in the engine load. Allow the engine to return to a stabilized idle. An automatic transmission must remain in drive. A manual transmission is shifted into neutral. Do not touch the accelerator pedal, steering wheel or HVAC controls while a catalyst test is in progress.
Certain conditions may cause a catalytic converter to degrade. These conditions may include the following conditions:
- An engine misfire.
- High engine oil or high coolant consumption.
- Retarded spark timing.
- Weak spark.
- Lean fuel mixture.
- Rich fuel mixture.
- Damaged oxygen sensor wiring harness.
- A catalyst may be temporarily degraded if a fuel with high sulfur content has been used. Drive the vehicle at highway speeds for 10 minutes and retest the converter.
- If 6 tests have been attempted and DTC has not run or passed during this key cycle, turn ignition off for 30 seconds. Perform the Conditions for Running a second time. See CONDITIONS FOR RUNNING DTC .
- A maximum of 12 tests per key cycle will run if each test is a combination of pass, fail, or abort tests.
- After a Code Clear, the catalyst test will run once if the test is a pass.