Chevrolet Cruze P0420 Catalytic Converter Diagnosis Explained

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Chevrolet Cruze P0420 Catalytic Converter Diagnosis Explained

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Fixing Cars With 15th St Automotive

Күн бұрын

We diagnose a P0420 Catalytic Converter Efficiency Low code.

Пікірлер: 8

@bartscave Ай бұрын

I just subscribed. I appreciate the time you spend sharing these videos.

@fixingcarswith15thstautomo36 Ай бұрын

Thanks for the sub!

@Arthur-sz7uf Ай бұрын

👍👍👍very informative video. Thanks again.!

@fixingcarswith15thstautomo36 Ай бұрын

More to come!

@joshuavera4547 Ай бұрын

Glad you're making videos again. Always appreciate the in depth detail diagnostics

@fixingcarswith15thstautomo36 Ай бұрын

Thanks! The shop is finally back to place that allows me to make videos again.

@shankman2k12 7 күн бұрын

Question. So my car is stilk throwing the p0420 code. My mechanic had already replaced the upstream o2 sensor maybe twice. Replaced the cat with two aftermarket and lastly also 1 oem cat. Still throws the code with a factory cat. Also a 2016 cruze lt limited. What else could be the issue?

@fixingcarswith15thstautomo36 6 күн бұрын

The code sets because the rear O2 sensor is overly active. The rear O2 sensor will have a nearly flatline signal at about 600 mv when a healthy catalytic converter is functioning properly. If the O2 sensor is still fluctuating between 200 mv and 800 mv then there is either an exhaust leak around the catalytic converter or the converter is weak. Aftermarket cats can be poor quality and do this, but OEM cats will usually function well. I would check rear O2 sensor operation (force the mixture super lean and see if it drops to low voltage and then force the mixture super rich and see if the voltage goes high) otherwise check for any exhaust leaks than could introduce stray oxygen into the exhaust stream that might change the rear O2 sensor reading.