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Old 12-24-2011, 01:01 PM   #1
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Code P0430

Is that the code for a bad gas cap?
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Old 12-24-2011, 01:21 PM   #2
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google it!
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Old 12-24-2011, 01:22 PM   #3
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P0430 OBD-II Trouble Code

Technical Description

Catalyst System Efficiency Below Threshold (Bank 2)
What does that mean?

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.
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Old 12-24-2011, 01:27 PM   #4
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Its an 06 and second owner so no warranty. Haven't found or heard any exhaust leaks. Guess I will start with 02 censors . Thanks for the input
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Old 12-24-2011, 01:28 PM   #5
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and the truck only has 65K miles the catalytic converter should still be good correct?
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Old 12-24-2011, 01:30 PM   #6
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more than likely yes

but i can assure that any OBD code you get is not a Bad gas cap..
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Old 12-24-2011, 01:40 PM   #7
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Hooked up my scanner cleared the codes and the light stayed off. Both oxygen sensors are show 0.00V?
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Old 12-24-2011, 01:41 PM   #8
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Quote:
Originally Posted by Cajun1 View Post
more than likely yes

but i can assure that any OBD code you get is not a Bad gas cap..
Happened to my moms trailblazer. The light would keep coming on until we replaced the gas cap. Some evap threshold below level or something like that
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Old 01-05-2012, 08:19 AM   #9
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Quote:
Originally Posted by 4x4jeep View Post
Its an 06 and second owner so no warranty. Haven't found or heard any exhaust leaks. Guess I will start with 02 censors . Thanks for the input
You might want to check, but I think certain emissions systems (like cats) are covered for 8yrs/ 80k miles regardless of whether you are the first owner or not.
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