How do I know if my catalytic converter is failing? Welcome to Mercie J, where compassion and craftsmanship come together, I'm Rick Smith.

So a catalytic converter can fail catastrophically and if it melts down, it can plug the exhaust and then your engine will either not run or have very little power.

Can an independent repair mechanic get factory certification? Welcome to Mercie J Auto Care, where compassion and craftsmanship come together, I'm Rick Smith.

First of all let me help you understand a couple of things about our industry. We are not like the other trades, we don't have like a register of contractors, so the certifications for us are voluntary.

How do I know if my AC needs recharged?

How do I know if my AC needs recharged?

Why does my AC not blow cold?

So first of all, an oxygen sensor, the old school ones that have been around for a very long time, they change voltages based on the amount of oxygen in the exhaust. So typically below half a volt, the system's lean above half a volt, the system's rich.