Is DTC 2AA9 Definitely Related to the DISA Valve?

Technical Discussions
1

I’m currently troubleshooting a DTC 2AA9, and I suspect it might be linked to the DISA valve in my vehicle. I’ve read mixed things online, and I’m hoping to get some clarity from others who might have experienced this.

Here’s what I’ve gathered so far:

  • The DISA valve plays a critical role in optimizing intake airflow, which is vital for both performance and emissions.
  • I’ve noticed a drop in performance lately, plus some odd sounds when I accelerate.
  • The error code appeared right after I filled up on gas, which has me wondering if it could be fuel-related as well.

Questions:

  1. Has anyone else encountered this code and found it to definitely relate to the DISA valve?
  2. What steps did you take to diagnose or address this issue?
  3. Could there be other causes for this DTC besides a faulty DISA valve?

I’d appreciate any insights or experiences you could share!