Just bought the car from a friend (2002 SS) with 40000 mi and installed a Hypertech programer ( I feel no differance ) and a K& N air filter,anyway it had B3128 code in it. Can anybody tell me what this code is? Thanks.

 

LF door only, unlock circuit high



thats what the code is....does your door locks work??

 

Thanks. Yes they work fine. I also re-installed the Hypertech program and I can feel some difference. Thanks again.