Ever since I first purchased my 04LC in 2019 it occaisionally throws CAT codes for both banks. Always right after a fill up, usually when getting winter gas (though not always). Happens once or twice a year whether highway driving or around town stuff. If I reset the codes with Carista they don’t come back for many months. If I don’t reset the codes the CEL goes off in about 1000 miles. I have put on over 100,000 miles since purchase, any suggestions on things to check out? I replaced the fuel cap (with a Toyota OEM) right after purchasing the vehicle.
I did search but could not find any complaints centering around tanking up. Currently on a trip and will replace all 4 o2’s when I get home (over 300k miles and cannot find any records of previous replacement.).
Thanks in advance for any trains of thought to chase.
I did search but could not find any complaints centering around tanking up. Currently on a trip and will replace all 4 o2’s when I get home (over 300k miles and cannot find any records of previous replacement.).
Thanks in advance for any trains of thought to chase.