Hello all! I took a moment to read a code this morning. I have experienced NO symptoms of trouble before or since this code popped up a few days ago. However, after reading on this forum how to interpret the code I am a little terrified. Here is what I found on this forum for p0430:

P0430
• Defective Catalytic Converter.
• Internal engine damage resulting in high oil consumption and/or a leaking Head Gasket has damaged the Catalytic Converter.

Reader indicated BANK 2.

Can any one offer feedback?
’09 XJ Portfolio
Much appreciated!

Tob
New Orleans

 

I should have added that the car has 46k miles and I was able to clear the code. Also THANKS for posting the most likely interpretations of the codes... very helpful!

 

It's not likely to be engine damage so discount that one.

Things it might be:
1. yes, the cat
2. an air leak in the exhaust
3. a partially failed O2 sensor

I'd start by looking at fuel trims (boy are there many posts on how/what!) hoping for hints and also instead of deleting the code get its freeze frame data.

BTW do NOT clear code if you have smog/etc due!!

 

Thank you JagV8. The input is appreciated... especially since this is the first time I have dealt with this code and issue. I will do some more snooping around!

For you and others:
-Can the 02 sensor be checked?
-Are you aware of an oem supplier that is equal to the jag p/n for catalytic and o2 sensor?
- The code indicated Bank 2... which side is that... the Portfolio is LHD?

Thanks. Any other feedback from other readers?

 

Ebay is your friend when looking for parts.

Stay with the same brand of o2 sensors.

Believe they are all Denso's, they were on the 04.

Heard you can have issues with other brands.

 

Hi Tob,

P0430 means "Catalyst Efficiency Below Threshold," and as JagV8 said it can be caused by a host of things. Here are the official definition and possible causes from the DTC Summaries manual:



A quick way to check your catalytic converter is with a touchless infrared thermometer. With the engine at full operating temperature, measure the temperature at the inlet end of the cat, then at the outlet end. You're looking for the outlet end to be at least 100 degrees Fahrenheit hotter than the inlet end. Be sure to aim your thermometer at the pipes right where they connect to the cat and not at the heat shields.

If both cats seem to be heating up properly, the next step would be to observe your fuel trims and O2S signals via Live Data on a scan tool to look for signs of a lazy or out-of-range O2S, lean or rich running, etc., and diagnose accordingly.

Cheers,

Don

 

Yes, the OE O2Ss are by Denso. But be aware that some parts sold on eBay are counterfeit. Try our forum sponsors, as well as Rock Auto and FCP Euro.

Cheers,

Don

 

Thanks Wingrider! That is excellent input. I have an idea where to go from here, what to check, and how to check it! Encouraged!