Cataclean and EGR Clog Codes

Mendel Leisk · Feb 26, 2023

Or YouTube.

C-in-DC · Feb 28, 2023

Cat test

C-in-DC · Feb 28, 2023

I dumped 2 more bottles of cataclean in. Gonna drive up to bmore and back to see if it'll go through the system. I drive 5 hours daily so I should go through the tank before the end of the week. My consumption is at 37 mpg right now. 17 avg.

C-in-DC · Feb 28, 2023

Cat test

C-in-DC · Feb 28, 2023

Mendel Leisk said: ↑

Or YouTube.
Click to expand...

Mendel Leisk · Feb 28, 2023

C-in-DC · Feb 28, 2023

Mendel Leisk said: ↑

View attachment 237707
Click to expand...

I think I need to change the o2 sensor if I’m not getting a voltage reading.

C-in-DC · Feb 28, 2023

Mendel Leisk said: ↑

View attachment 237707
Click to expand...

What are you trying to show me?

Mendel Leisk · Feb 28, 2023

C-in-DC said: ↑

What are you trying to show me?
Click to expand...

I thought a jpg might be easier than a video.

C-in-DC · Mar 1, 2023

Mendel Leisk said: ↑

I thought a jpg might be easier than a video.
Click to expand...

Any suggestions on this other than changing the o2 sensor?

C-in-DC · Mar 1, 2023

mr_guy_mann said: ↑

Those temperature numbers are engineering guesstimates based on A/F and O2 sensor heater current.

You have the ThinkDiag. Do the "A/F rich-lean %" test under actuator tests. This will mimic the ECM's OSC cat test. (I haven't done this specifically on the ThinkDiag but it should work).

Drive the car to get the engine and cat hot. Force the engine to stay running. On my Gen2 I set the parking brake, blip the gas to start the ICE and shift to neutral before it shuts off. (Don't leave it too long because the HV system won't charge).

On the scantool start the test- then you want to select only the data for the A/F and O2 voltages. (record the following data however you can)
Switch to +25% and let it run for 10-15 seconds. A/F should be near 2.0V and O2 near 1.0V. Switch to -12%. A/F should go to almost 4.0V immediately. The wait before the O2 drops to near 0V is a measure of the cat's OSC. A very good cat takes 9 seconds or more. I usually see P0420 at 2-3 seconds or less.

Posted via the PriusChat mobile app.
Click to expand...

Any other suggestion on this?

C-in-DC · Mar 3, 2023

mr_guy_mann said: ↑

Those temperature numbers are engineering guesstimates based on A/F and O2 sensor heater current.

You have the ThinkDiag. Do the "A/F rich-lean %" test under actuator tests. This will mimic the ECM's OSC cat test. (I haven't done this specifically on the ThinkDiag but it should work).

Drive the car to get the engine and cat hot. Force the engine to stay running. On my Gen2 I set the parking brake, blip the gas to start the ICE and shift to neutral before it shuts off. (Don't leave it too long because the HV system won't charge).

On the scantool start the test- then you want to select only the data for the A/F and O2 voltages. (record the following data however you can)
Switch to +25% and let it run for 10-15 seconds. A/F should be near 2.0V and O2 near 1.0V. Switch to -12%. A/F should go to almost 4.0V immediately. The wait before the O2 drops to near 0V is a measure of the cat's OSC. A very good cat takes 9 seconds or more. I usually see P0420 at 2-3 seconds or less.

Posted via the PriusChat mobile app.
Click to expand...

@mr_guy_mann I guess I give up and admit I need a new catalytic converter. I’m sure people have asked about this thousands of times on here. Do I get the after market heat exchanger with the cat? Heat exchanger same as resonator?

2010 TOYOTA PRIUS 1.8L L4 ELECTRIC Exhaust & Emission Parts | RockAuto

C-in-DC · Mar 3, 2023

https://www.ebay.com/itm/374203959886?fits=Year%3A2010%7CEngine+-+Liter_Display%3A1.8L%7CTrim%3ABase+Hatchback+4-Door%7CModel%3APrius%7CMake%3AToyota%7CSubmodel%3ABase%7CEngine%3A1.8L+1798CC+110Cu.+In.+l4+FULL+HYBRID+EV-GAS+%28FHEV%29+DOHC+Naturally+Aspirated%7CSubmodel%3ABase%7CEngine%3A1.8L+1798CC+110Cu.+In.+l4+FULL+HYBRID+EV-GAS+%28FHEV%29+DOHC+Naturally+Aspirated&hash=item57204b4a4e:g:fcEAAOSwKz5i6olr&amdata=enc%3AAQAHAAAA8AvJYmdSFq6qx9DglnwyLo5L88esqeQb6%2FezK%2F1DhHtEm1c6TgObdBwQ4I%2FUEo3KR6g5Hf6c4eIw%2BNFVokg86kMG3G4shxHLTLpXvvKD4sscY4a9m6PmG1GpdFupbTu2HAp6nrFLGKJgzWSAE2E2e22jAk2YH8s3T4%2FcuOFT4UepRmRoicz%2FYdXd7xGxNFfR2kT%2B46dUZgOWAdUoZ3Gll0Q%2BfBMVPDeMHbum6MUv2d7hiy5vXBpaRNR7ny9w5ATgcPt%2FT0Fx4TNMSLpT2jxV2CLullR5eR0G6qiK6N4HPxRp0W8DDkXVNgIYBiIIu5C3GA%3D%3D%7Ctkp%3ABlBMUOSV1IDVYQ

Is this fools gold or real?

AzusaPrius · Mar 4, 2023

Do NOT buy that, it is not OEM.

Try another bottle of Cataclean.

Once you see that it will clear the P0420 just keep using your car and test how long it takes to come back on if it does.

If it does come back just use your car up until you need a smog, then use another can a month before the test to pass it.

You will have your tags and be able to use your car until you source a real OEM cat.

Your other expensive option, which I went with is the Magnaflow cat 5681455 but they also sell out fast so the wait time for any of these two will be a long time.

Cataclean works

C-in-DC · Mar 4, 2023

AzusaPrius said: ↑

Do NOT buy that, it is not OEM.

Try another bottle of Cataclean.

Once you see that it will clear the P0420 just keep using your car and test how long it takes to come back on if it does.

If it does come back just use your car up until you need a smog, then use another can a month before the test to pass it.

You will have your tags and be able to use your car until you source a real OEM cat.

Your other expensive option, which I went with is the Magnaflow cat 5681455 but they also sell out fast so the wait time for any of these two will be a long time.

Cataclean works
Click to expand...

Did my usual driving routine today (5 hours). the last of the cataclean mixed gas was used up prior to beginning.

Before I drove for 5 hours, I refueled with premium gas and cleared the check engine light with my scan tool. Also swapped out the gas cap since I keep getting an evap code.

The check engine light didn’t come on until I drove at highway speed for more than 3 minutes straight after driving city miles for 5 hours. Oddly enough, I got the P0401 code only. When I replaced the egr valve and cooler during the engine swap I never did the tsb software update! Didn’t know about it until I read more threads about the code.

Could this be the light at the end of the tunnel? Could my catalytic converter be okay? Hopefully I find out soon. Could it all be corrected with a simple software update!?

C-in-DC · Mar 4, 2023

The dealer reset the egr system with the software update. Evap codes and p0401 are gone. P0420 came back without the check engine light on as “pending.”
Muffler shop quoted 600 for a replacement, sound reasonable?

ColoradoCrow · Mar 4, 2023

C-in-DC said: ↑

The dealer reset the egr system with the software update. Evap codes and p0401 are gone. P0420 came back without the check engine light on as “pending.”
Muffler shop quoted 600 for a replacement, sound reasonable?
Click to expand...

What are they doing for $600? A new CAT? installed?

C-in-DC · Mar 4, 2023

ColoradoCrow said: ↑

What are they doing for $600? A new CAT? installed?
Click to expand...

I’m assuming it’s removing and replacing with another used one. I don’t think it’s the magnaflow one @AzusaPrius mentioned. A new cat with a dealer discount in my area from Toyota is $1,200.

the threads on this subject are from three or four years ago so I don’t know what is the latest and greatest approach.

ColoradoCrow · Mar 4, 2023

C-in-DC said: ↑

I’m assuming it’s removing and replacing with another used one. I don’t think it’s the magnaflow one @AzusaPrius mentioned. A new cat with a dealer discount in my area from Toyota is $1,200.

the threads on this subject are from three or four years ago so I don’t know what is the latest and greatest approach.
Click to expand...

OK. That makes sense. As long as you pass smog with an OEM you should be good. It will probably boost your mpg making you op cost for work even better. Should pay for itself shortly.

C-in-DC · Mar 4, 2023

ColoradoCrow said: ↑

OK. That makes sense. As long as you pass smog with an OEM you should be good. It will probably boost your mpg making you op cost for work even better. Should pay for itself shortly.
Click to expand...

I passed emissions inspection here last year before my head gasket blew so it won’t be up for re-inspection until December. Could I drive with the dirty catalytic converter without damaging the engine? Financially it would help to ignore it.

Cataclean and EGR Clog Codes

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