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Originally Posted by jayjp200
Buddy,
What did you do for your new o2 sensors check engine light problem.
I have a same problem after I replaced all my O2 sensors from Bosch. I would like to have some help from you.
Please reply.
Thanks and regards,
Jay
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Jay,
I ended up switching both down stream sensors, one original and one new, with each other. Then the check engine light came back on reading both down stream sensors bad. I replaced the original downstream sensor with a new one, so now both downstream sensors were new. My thinking was that if the old sensor and new sensor were reading at different rates it might cause the fault. Then the check engine light came back on with the original P0156 code. I figured that I would have to take the van into the shop to get it fixed but a fews days later the check engine light went out. I immediately went and got my smog test and passed. The check engine light has not returned to this day (knock on wood).