98 ford explorer po 430 code
Cargo Master
Joined: Aug 2003
Posts: 3,263
Likes: 92
From: BC Canada
P0430, cat below efficiency level bank 2.
Bank 2 is the driver side and this code is for the O2 sensor behind the Cat, it is for monitoring purposes only annd does not affect the driveability.
have you checked the sensor for proper operation? There are many reasons why this code shows up, mainly due to out of range operation of something upstream
Bank 2 is the driver side and this code is for the O2 sensor behind the Cat, it is for monitoring purposes only annd does not affect the driveability.
have you checked the sensor for proper operation? There are many reasons why this code shows up, mainly due to out of range operation of something upstream
Elder User
Joined: Sep 2006
Posts: 871
Likes: 0
Typically when this code is set it's because the catalytic converter has failed. Make sure it gets replaced with a quality, OBDII compatible replacement, as many "universal" designs aren't efficient enough and can cause this code to set. (Hint, most "exhaust" specialty shops like Car-X, Meineke, Midas, etc. will cut/weld in universal converters because they are easy to sell due to the low price... however this practice doesn't always work).
I've also seen this code set due to exhaust leaks, or use of a silicone sealant on the exhaust system. Typically if you have a bad O2 sensor, or catalyst monitor it will set another code for that, but stranger things have happened.
Good luck
I've also seen this code set due to exhaust leaks, or use of a silicone sealant on the exhaust system. Typically if you have a bad O2 sensor, or catalyst monitor it will set another code for that, but stranger things have happened.
Good luck
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