We diagnose a P0420 Catalytic Converter Efficiency Low code.
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@bartscaveАй бұрын
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@fixingcarswith15thstautomo36Ай бұрын
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@Arthur-sz7ufАй бұрын
👍👍👍very informative video. Thanks again.!
@fixingcarswith15thstautomo36Ай бұрын
More to come!
@joshuavera4547Ай бұрын
Glad you're making videos again. Always appreciate the in depth detail diagnostics
@fixingcarswith15thstautomo36Ай бұрын
Thanks! The shop is finally back to place that allows me to make videos again.
@shankman2k127 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?
@fixingcarswith15thstautomo366 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.