Catalytic Converter, Checking
Observe all safety precautions: SAFETY PRECAUTIONS
View clean working conditions: CLEAN WORKING CONDITIONS
Prior to repair work, perform a preliminary check to verify the condition. Refer to PRELIMINARY CHECK .
Special tools and workshop equipment required
- Generic scan tool
Test requirements
- Battery voltage at least 12.5 volts
- No leaks or damage to the exhaust system.
- Oxygen sensors OK
Test procedure
-- Perform the function test in Diagnostic Mode 06. Refer to DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS .
If the specified values are exceeded:
-- Check the exhaust system for leaks.
-- Repair as necessary.
If no leaks are found in the exhaust system, no O2 sensor codes set and DTC P0420 is set:
-- Replace the catalytic converter. Refer to the service information for removal and installation procedures.
Final procedures
After repair work, the following work steps must be performed in the following sequence:
- Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
- If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
- If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .