I'm nit-picking here, and I realize that. Reading this statement in a vacuum, it seems completely and totally reasonable. A no-brainer, even. I guess that's why I'm here! This sentence
A computing professional should be fair and not make deliberately false or misleading claims and should provide full disclosure of all pertinent system limitations and potential problems.
is actually a bit restrictive. A common tool product managers use is to intentionally deceive customers in a way that does not harm them in order to better understand their needs. For example, let's say we want to evaluate whether or not there's demand for feature XYZ. We might built some scaffolding into the product that makes it look like XYZ is already there. When a customer interacts with it, we can say, "Hey, thanks for your interest! This isn't available yet." Or something to that effect.
I think the main difference here is that the result of this particular misleading claim is really, really benign. Conversely, selling a product based on it having that feature, but not actually having that feature... that is much less benign. How about this:
"Honesty is an essential component of trust. A computing professional should be fair and not make deliberately false or meaningfully misleading claims and should disclose known limitations."