Close

check engine light is on , my code reader says P0420. on 2001 Toyota Tacoma

i found that the nuts that hold the downstream 02 sensor on the pipe rusted completely off. could air leaking in cause P0420? i put hose clamps around it to hold it on. the light is still on after a few trips. putting new nuts and gaskets on eventually.

Asked by for the 2001 Toyota Tacoma
yes an air leak could cause this issue reseal 1st and see what happens
1 more answer
yes it could
Qualified Local Toyota Shops
Qualified Toyota Shops For This Repair
921 N Parker St
Orange
95
Technical Ability
93
Tools & Equipment
92
Customer Service
96
Customer Amenities
Group
CLOSED NOW
(714) 486-0367