AP Emissions

05/25/2026

Catalytic converters aren’t maintenance items. When one fails, something caused it.

Misfires, vacuum leaks, exhaust leaks, lazy O2 sensors or catalyst poisoning are usually the real culprits. If failure happens under 80,000 miles, OEM warranty may apply. Beyond that, an aftermarket converter is often the right solution — designed to last the rest of the vehicle’s life when the root issue has been corrected.

The key isn’t just choosing the replacement. It’s understanding why the original failed in the first place.

Learn more about catalytic converter and O2 sensor diagnostics here:
https://app.webinar.net/XmPR0Zj0lYa?mcc=social

05/22/2026

Replacing the catalytic converter again… and again?

Converters rarely fail on their own. Misfires, vacuum leaks, exhaust leaks, lazy O2 sensors and other engine management issues are usually the real cause.

If you don’t fix what killed the cat first, the cycle continues. Diagnose the root problem. Then replace the converter.

Want to go deeper into catalytic converter and O2 sensor diagnostics? Access the full training session here:
https://bit.ly/4lwVcAp

05/14/2026

Want to stop converter comebacks? Proper diagnosis and technician training make all the difference. This article from Counterman breaks down how AP Emissions’ approach helps you get it right the first time.

👉 Read the full article: https://www.counterman.com/stop-converter-comebacks-with-diagnosis-and-technician-training-from-ap-emissions/

How Better Testing and Better Training Keep the Light Off The Real Cost of Converter Comebacks Catalytic converter comebacks are among the most expensive problems a shop can face. They drain labor hours, strain part seller relationships, and force difficult conversations with customers who expected....

05/06/2026

Explore AP Emissions’ full video library — featuring product overviews, diagnostic tips, emissions education, manufacturing insights, and real-world tech guidance.

From catalytic converter FAQs to P0420 diagnostics and O2 sensor training, you’ll find videos designed to support technicians, counter pros, and anyone working in the aftermarket.

Watch the full collection here ⬇️
https://apemissions.com/videos/

Videos AP Emissions 21 Videos ANSA Muffler Line 3:11 Aftermarket VS OE AP Sales Video #1 3:19 AP Sales Video #2 2:19 AP Sales Video #3 2:27 AP Sales Meeting Recap 1:07 CAT Maintenance Tips Catalytic Converter FAQ Catalytic Converter Development Process 4:40 Checking Your Fuel 2:18 Converter Theft 5:...

04/28/2026

Serving the aftermarket since 1927 — and still driven by the same mission.
Provide reliable emissions and exhaust solutions that meet clean-air standards and keep vehicles performing at their best. https://apemissions.com/

04/20/2026

Before calling a catalytic converter “dead from old age,” make sure the ECM doesn’t need an update.
This module explains why certain vehicles — like the Chevy Cruze and several Toyota models — require ECM reflashes before installing a new three-way catalyst.

Want to go deeper into emissions diagnostics and case studies? Explore the AP Emissions Training Academy.
🔗 https://lms.apemissions.com/

04/17/2026

The Chevy Cruze doesn’t have one problem… it has many.
In this Training Academy case study, we break down the most common issues techs see: emissions recalls, oil consumption, turbo seal failures, cracked manifolds, purge system problems and more.

Want deeper diagnostic training? Explore the full AP Emissions Training Academy for complete modules and case studies.

🔗 Start learning: https://lms.apemissions.com/

04/09/2026

Learn how to diagnose a lazy O2 sensor before it triggers bigger catalytic converter issues. This quick lesson breaks down ideal voltage ranges, rise and fall times, and what to look for in real-world waveforms.

Want more hands-on training like this? Explore the AP Emissions Training Academy for full video courses and technical modules.

🔗 Start learning: https://lms.apemissions.com/

04/01/2026

It’s easy to overlook the importance of O₂ sensors — but precision, reliability and durability make all the difference. This article explains why properly engineered sensors matter when it comes to emissions control, engine efficiency, and long-term performance.

👉 Read the full article: https://bit.ly/4usoaWx

You’ve been there: a car rolls in, the check engine light is back on, and your tech mutters, “It’s that cheap O₂ sensor again.” That’s the problem AP Emissions set out to solve. Our new line of 100 percent planar oxygen and air-fuel ratio sensors is engineered for accuracy, reliability a...

03/24/2026

It’s easy to blame the aftermarket converter when the light comes back on, but often the part itself isn’t the problem.

This article breaks down the real issues behind converter comebacks and the diagnostic steps every shop should take to fix the root cause the first time.

👉 Read the full article: https://bit.ly/4uunW0O

Upstream issues often cause converter failures. Proper diagnostics protect profits, customers, and shop reputations.