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frontpage Posted by KimsreangK ā¢ Feb 20, 2025
Feb 20, 2025 7:11 PM
Item 1 of 2
Item 1 of 2
frontpage Posted by KimsreangK ā¢ Feb 20, 2025
Feb 20, 2025 7:11 PM
Gearwrench Professional Bi-Directional Diagnostic Scan Tool
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$150
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Usually looking at live data is going to be what you want to do here. First engine and cat need to be at full operating temp. You need to ensure your pre-cat sensor is switching from rich to clean, back and fourth constantly. This can be tricky since data you ready from OBDII is technically already processed and isn't true "real time" data. Anyway, after you confirm the pre cat O2 sensor is working you will need to look at the post cat sensor. The post cat sensor should be fairly steady, and occasional lean or rich even is ok, but it should stabilize pretty quickly. If you see constant switching (low to high that follows the precat O2) then its highly likely your Cat is bad and needs to be replaced.
Keep in mind that Catalytic converters WILL get poisoned by engines that are misfiring and essentially dummping raw fuel into the cat, also oil consuption or coolant consumption will also ruin your cats pretty quickly. So if your car suffers from misfires or consumes oil you will need should address it ASAP or your new cat will quickly fail too.
Cats should last hundreds of thousands of miles... My 06 BMW 330i that has 250K miles just started with symptoms of a bat cat, but that car has consumed oil its entire life due to a poorly designed PCV system that BMW completely redesigned for following years of the 3 series. 2015 definitely seems like premature failure of the cat unless you have a ton of miles (think 200k-300K+)
edit: I forgot to mention that sometimes people have had success with products like "CataClean" to get their cats back up to a more functional state.
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Our community has rated this post as helpful. If you agree, why not thank Shimejii
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Currently I have a BT dongle and torque. What is the great advantage of the bidirectional?
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Wanna work around is to disconnect the battery before doing the brake job .
Usually looking at live data is going to be what you want to do here. First engine and cat need to be at full operating temp. You need to ensure your pre-cat sensor is switching from rich to clean, back and fourth constantly. This can be tricky since data you ready from OBDII is technically already processed and isn't true "real time" data. Anyway, after you confirm the pre cat O2 sensor is working you will need to look at the post cat sensor. The post cat sensor should be fairly steady, and occasional lean or rich even is ok, but it should stabilize pretty quickly. If you see constant switching (low to high that follows the precat O2) then its highly likely your Cat is bad and needs to be replaced.
Keep in mind that Catalytic converters WILL get poisoned by engines that are misfiring and essentially dummping raw fuel into the cat, also oil consuption or coolant consumption will also ruin your cats pretty quickly. So if your car suffers from misfires or consumes oil you will need should address it ASAP or your new cat will quickly fail too.
Cats should last hundreds of thousands of miles... My 06 BMW 330i that has 250K miles just started with symptoms of a bat cat, but that car has consumed oil its entire life due to a poorly designed PCV system that BMW completely redesigned for following years of the 3 series. 2015 definitely seems like premature failure of the cat unless you have a ton of miles (think 200k-300K+)
edit: I forgot to mention that sometimes people have had success with products like "CataClean" to get their cats back up to a more functional state.
Currently I have a BT dongle and torque. What is the great advantage of the bidirectional?
For example, the locks don't lock when you hit the button, is it the button, the module (what every calls a computer), the wires, etc... well the Bi-directional tool will allow you to trigger the lock mechanism thru the computer without the button or button's wiring. If it works you know to look at the button or the wiring from the button, if it doesn't work you look at the module.
There are TONS of useful features for the bi-directional support. In fact I would almost go as far as saying that tools that aren't bi-directional are not really worth purchasing.... ALMOST....
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