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Old 11-07-2008, 05:50 PM #1
Jorgechon Jorgechon is offline
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Join Date: Nov 2008
Location: Tegucigalpa, Honduras
Age: 41
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Jorgechon Jorgechon is offline
Junior Member
 
Join Date: Nov 2008
Location: Tegucigalpa, Honduras
Age: 41
Posts: 1
Jorgechon is an unknown quantity at this point
Exclamation Problems with P0423 Heated Catalyst Efficiency Below Threshold (Bank 1)
I recently had a P0433 problem my mechanic had the oxygen sensor changed from the passanger side. Now couple of days later i have a P0423 Heated Catalyst Efficiency Below Threshold (Bank 1).... and he tells me to change the oxygen sensor in the drivers side.

Why didnt i get both obd2 codes at the same time if both were supposed to not be working properly!!
Do you really think that the sensors are the problem??

I drive a 4R 2003 sport edition V6. 4.0.
The dash board tells me that im doing a lousy 11.5 mpg!!

anyone help!!
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