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Error codes after ECM reprogramming

Hi folks. I had the ECM reprogrammed for full time 8 cylinder mode and as advised in the faq, I’m getting a lean bank 1 and bank 2 code. I need to have the relearn procedure done with a scanner, but my scanner isn’t high enough quality to do this. Anybody have suggestions which scanner I can get that won’t break the bank, yet will allow me to do this? My truck is an 08 with the 5.3l engine. Thanks!

7 comments

7 Comments

Crazed Performance Repair

Jan 06, 2023

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Not sure what relearn you would need. Was a ECM AFM tune out the only thing you did? Have you checked for a vacuum leak somewhere yet? What are your long term fuel trims doing?

hahop

Jan 06, 2023

Replying to

Yep, the ECM reprogram was the only thing I had done. Once up to temperature, the engine would sporadically rev to 2k and stick there until I shut it down, then, on restart, it would idle at 800 or so. The lean bank 1 and 2 codes were the only ones. I will double check all the air intake and vacuum lines this weekend to make sure they aren't the issue, but hey. I needed an excuse to get a better diagnostic tool anyway, right?