I had my car inspected and it didn't pass emissions due to catalyst efficiency low in bank 1&2; however at autozone it only said in bank 2. The mechanic told me I would have to replace both catalytic converters, but that there were already aftermarket converters on there. I don't see how they could already need replaced again. Is there anything else that could be causing this reading? Also, in my online search for a reason, I saw that after market converters could cause this reading. I do not have the money to change 2 converters, especially if it's not needed. Any suggestions?
There are different cat converters on the market but I would investigate the possibility of the HO 2sensors not being compatible with the converters thereby giving the CPU an incorrect reading It is not a matter of faulty as so far as in efficient because they do not have the correct size medium inside to burn all the emissions fully
Testimonial: "I had suspected that it may just be the sensors so I will have them checked and changed to be compatible with the converters on my car now. Thank you so much...I will update with the conclusion once I get that done."
SOURCE: I have a 2004 sable.
When you detected one code P0174 - System Too Lean (Bank 2), this basically means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.
Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.
Symptoms: You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.
Causes: A code P0174 may mean that one or more of the following has happened:
The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
There could be a vacuum leak downstream of the MAF sensor.
Possible solutions include:
In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
Inspect all vacuum and PCV hoses, replace if necessary
Check for a dirty fuel filter and proper fuel pressure
Bank
2/Sensor 2 is at the bottom of the engine as you look in from the
bumper. It is installed in the exhaust pipe just below the catalytic
converter. The Bank 1/Sensor 2 is at the same location on the back of
the engine below the firewall.
P0430 means Catalyst System Efficiency Below Threshold (Bank 2) basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.
Symptoms: You will likely not notice any drivability problems, although there may be symptoms such as a rough/hard idle when cold.
Causes: A code P0430 may mean that one or more of the following has happened:
The catalytic converter is no longer functioning properly
An oxygen sensor is not reading (functioning) properly
There is an exhaust leak
Possible Solutions: First, inspect for exhaust leaks. Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it.
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.
Hope this helps.
SOURCE: 1997 Mercury Mountaineer What is Catalyst Efficiency Below (Bank
it means the catalyst is worn out, the efficiency is monitored by sensors, when the Cat falls below a certain reading or "threshold" the code is generating telling u that u need a new catalytic converter.
SOURCE: recently had my smog done check engine light w 3
P0171 indicates a lean condition. The most common cause of
this is a defective mass air flow sensor. Also check if any vacuum
leaks. System Too Lean (Bank 2) Basically this means that an oxygen sensor in bank 2 detected a
lean condition (too much oxygen in the
exhaust. Note: This DTC is very similar to P0171, and in fact your vehicle
may show both codes at the same time. ----------- P0430 means you're going to buy a cat. (And you'll have to fix the coolant leak.)Catalyst System Low Efficiency (Bank 2) .Also check O2 sensors . Thanks.
P0174 OBD-II
Trouble Code
Technical
Description
What does
that mean?
SOURCE: replacing my bank 2 catalytic converter - 2000 mercury cougar
what does code P0430 cat bank 2 mean? how many cat. converters does my car have? which one do i need? on my 2000 Mercury Cougar 2.5 liter auto trans.
A code P0430 may mean that one or more of the following has happened:
First, inspect for exhaust leaks.
Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor
while you're at it.
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.
Td
Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
Inspect the downstream heated oxygen sensor (HO2), replace if necessary
Replace the catalytic converter
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.
for p0430, try:
.
First, inspect for exhaust leaks.
Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen o2 sensor while you're at it.
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.
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