Results 1 to 7 of 7
Thread: Weird O2 sensor readings
06-09-2013, 11:47 AM #1
- Join Date
- Dec 2011
- Blog Entries
Weird O2 sensor readings
Recently I bought an OBDII Bluetooth adapter to monitor my Tahoe's engine performance and see extra/more exact info from the ECU. Currently my o2 sensors are giving conflicting readings.
What do I mean? Well the pre cat sensors at idle were reading a F/T of -1.6% for both the 1x1 and 2x1 sensors. While the post cat sensors are reading a F/T of 99.1% for both 1x2 and 2x2 sensors. Based on the info I've learned these readings are impossible. Does any one have an idea whats up with these readings? I have been getting a p0340 cat three way inefficiency code for the pass side cat recently, but the code keeps going away even tho its a major code that should stay in the ECU for a long time.
Pic from torque app at idle:
1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.
Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door
By italie in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)Replies: 0Last Post: 05-11-2013, 07:59 PM
By fulltimer in forum General Chevy & GM Tech QuestionsReplies: 2Last Post: 09-28-2011, 10:23 PM
By bigbluesub in forum GM PowertrainReplies: 3Last Post: 09-02-2010, 10:59 PM
By dsfloyd in forum GM PowertrainReplies: 4Last Post: 08-30-2010, 03:51 PM
By CMS in forum General Chevy & GM Tech QuestionsReplies: 2Last Post: 08-15-2010, 02:28 PM