Hello Nairalanders.

Please I need your help and expertise to interpret the errors attached. I use a Toyota Camry 2011, 4 cylinders.

Thank you in advance!

Did you ask the one who ran the scan? They usually can interpret. You also can look up online. Or visit a professional automobile workshop.





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BestGospelMusic:
Did you ask the one who ran the scan? They usually can interpret. You also can look up online. Or visit a professional automobile workshop.





Meanwhile the first ever gospel Afrobeat is trending via https://mide./1Time4DBigGod

The person who ran it happened to be a novice. Just that they are fortunate to have the device.

About looking it up online, that's exactly what I am doing here

TechWalker007:


The person who ran it happened to be a novice. Just that they are fortunate to have the device.

About looking it up online, that's exactly what I am doing here

���� Well done

TechWalker007:
Hello Nairalanders.

Please I need your help and expertise to interpret the errors attached. I use a Toyota Camry 2011, 4 cylinders.

Thank you in advance!

The first 3 set of codes are the same.
A P0420 code indicates a problem with the catalytic converter. The purpose of the catalytic converter is to break down harmful pollutants created during the combustion cycle.

Second code is triggered probably because of the first ones. It means there's a problem with your engine. It pointed out ABS and others so check that.

Kelvin30286063:

The first 3 set of codes are the same.
A P0420 code indicates a problem with the catalytic converter. The purpose of the catalytic converter is to break down harmful pollutants created during the combustion cycle.

Second code is triggered probably because of the first ones. It means there's a problem with your engine. It pointed out ABS and others so check that.

Thank you so much, very helpful.

My mechanic told me that they removed the catalyst and we need to replace it. I doubt him because it doesn't show the "check engine" warning on my dashboard. I thought this is what happens when catalyst is removed

EDUCATE YOURSELF: HERE'S THE EXPLANATION OF YOUR DIAGNOSTIC CODE

Catalyst System Efficiency Below Threshold' - P0420 Code
Catalyst System Efficiency Below Threshold (Bank 1) - is one of several trouble codes that fall into the general exhaust system code block.

All P042X codes (where "X" can be any number) refer to the catalytic converter and exhaust system. P0420 refers to the catalytic converter or - more specifically - the oxygen (O2) sensors before and after it on the bank 1 side of the exhaust system.

Exhaust System Schematic

On most vehicles, there is an O2 sensor both in front (upstream) and behind (downstream) the catalytic converter. Normally, these two O2 sensors will have different readings when the car is running. The upstream sensor should have a fluctuating oxygen level, dependent on the amount of exhaust being created and the engine's fuel consumption rate.

As the exhaust gases enter the catalytic converter, they should be "scrubbed" (or converted). When these gases are read by the second (downstream) O2 sensor, oxygen readings should be relatively steady. Thus, when your vehicle is functioning properly, the reading from the first O2 sensor to the second should be quite different.

However, if the readings taken by the O2 sensors before and after the catalytic converter are the same (or very similar), the P0420 code will trip.

Most of the time, a similar reading means that the catalytic converter is not working as efficiently as it should be. However, this trouble code can also trigger when things upstream are not doing well. As a general rule, if your engine trips a P0420 code along with other upstream trouble codes, the problem you're having likely isn't related to the catalytic converter.

However, if the P0420 code is the only trouble code - or if the other codes are all P042X codes - the likelihood of a failed catalytic converter is much higher.

Likely Causes For P0420 Trouble Code
Leaded fuel in an unleaded system will nearly always trigger this, given the differing properties of leaded fuel combustion and exhaust.
Failed O2 sensors or connections are also possible culprits.
A failed catalytic converter.
Other less likely problems: an issue with the coolant temperature sensor, an exhaust manifold leak, a spark timing issue, leaking fuel injectors, misfires, or fuel oil contamination.
Because there are a lot of possible problems that could cause a PO420 code, it's a good idea to check the (far cheaper) oxygen sensors and other items before you invest in a new catalytic converter.

NMotorwerks:
EDUCATE YOURSELF: HERE'S THE EXPLANATION OF YOUR DIAGNOSTIC CODE

Catalyst System Efficiency Below Threshold' - P0420 Code
Catalyst System Efficiency Below Threshold (Bank 1) - is one of several trouble codes that fall into the general exhaust system code block.

All P042X codes (where "X" can be any number) refer to the catalytic converter and exhaust system. P0420 refers to the catalytic converter or - more specifically - the oxygen (O2) sensors before and after it on the bank 1 side of the exhaust system.

Exhaust System Schematic

On most vehicles, there is an O2 sensor both in front (upstream) and behind (downstream) the catalytic converter. Normally, these two O2 sensors will have different readings when the car is running. The upstream sensor should have a fluctuating oxygen level, dependent on the amount of exhaust being created and the engine's fuel consumption rate.

As the exhaust gases enter the catalytic converter, they should be "scrubbed" (or converted). When these gases are read by the second (downstream) O2 sensor, oxygen readings should be relatively steady. Thus, when your vehicle is functioning properly, the reading from the first O2 sensor to the second should be quite different.

However, if the readings taken by the O2 sensors before and after the catalytic converter are the same (or very similar), the P0420 code will trip.

Most of the time, a similar reading means that the catalytic converter is not working as efficiently as it should be. However, this trouble code can also trigger when things upstream are not doing well. As a general rule, if your engine trips a P0420 code along with other upstream trouble codes, the problem you're having likely isn't related to the catalytic converter.

However, if the P0420 code is the only trouble code - or if the other codes are all P042X codes - the likelihood of a failed catalytic converter is much higher.

Likely Causes For P0420 Trouble Code
Leaded fuel in an unleaded system will nearly always trigger this, given the differing properties of leaded fuel combustion and exhaust.
Failed O2 sensors or connections are also possible culprits.
A failed catalytic converter.
Other less likely problems: an issue with the coolant temperature sensor, an exhaust manifold leak, a spark timing issue, leaking fuel injectors, misfires, or fuel oil contamination.
Because there are a lot of possible problems that could cause a PO420 code, it's a good idea to check the (far cheaper) oxygen sensors and other items before you invest in a new catalytic converter.

Enlightening stuff. Thank you for sharing