Need Help with SES code
01-28-2005, 06:29 PM
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Join Date: Apr 2004
Location: Dallas TX
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Need Help with SES code My SES light came on today on my way home from work 
The car seems to be operating normaly, but i went ahead and stopped off at Auto Zone to get them to run the code. Heres what they cam up with:
P0420
The PCM has determined that the catalyst system efficientcy for bank 1 is below the threshold for the currect engine operating conditions. (bank 1 identifies the location of cylinder # 1, while bank 2 identifies the cylinders on the opposite bank)
The best I can tell, it sounds like either my cats or an 02 sensor, but im not sure. Has anyone else seen this before? I would appreciate any input you guys have.
The car seems to be operating normaly, but i went ahead and stopped off at Auto Zone to get them to run the code. Heres what they cam up with:P0420
The PCM has determined that the catalyst system efficientcy for bank 1 is below the threshold for the currect engine operating conditions. (bank 1 identifies the location of cylinder # 1, while bank 2 identifies the cylinders on the opposite bank)
The best I can tell, it sounds like either my cats or an 02 sensor, but im not sure. Has anyone else seen this before? I would appreciate any input you guys have.
