2002 GS300 What is code 420
#1
05-23-2013, 02:33 PM
2002 GS300 What is code 420
Need help with meaning of OBDII code 420. Which side is Bank 2 and does it indicate the cat is bad or just an O2 sensor. Also would this have anything to do with hard shift between 2nd and 3rd?
Thx.
Thx.
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