New O2 sensors immediately throwing code
Thread Starter
Teching In
Joined: Oct 2017
Posts: 10
Likes: 0
From: Patterson, LA
New O2 sensors immediately throwing code so I recently done a few upgrades in preparation to put my car on the track for the first time. 98 Z28 LS1 T56. Magnaflow catback, new diff oil, and 2 new Denso upstream o2 sensors. Before, I was getting a po153 code for slow b2s1 o2. So I changed them both. Car ran a best time of 14.01@102.7 with a 2.27 60’. Checked the codes after, only to find now both bank 1 and 2 upstream sensors are “slow”. Cleared the codes, drove it for a day and of course they came back. I don’t know what to do. The car has stock manifolds and y pipe. Sensors were bought new from rock auto. Any ideas?
Thread Starter
Teching In
Joined: Oct 2017
Posts: 10
Likes: 0
From: Patterson, LA
