Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Catalytic Converters: Description
The catalytic converter is mounted in the exhaust system and serves to promote a chemical reaction which reduces exhaust emissions. The converter contains a thermocouple which turns on warning light on dash should converter begin to overheat. As the converter temperature approaches maximum permitted temperature, the light begins to blink and blinks faster if temperature continues to increase. When maximum temperature is obtained, light will stay on continuously due to a fuse blowing in the warning device circuit.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.