Acura B2991: Climate Control Unit Lost Communication with Audio Unit

Is your scanner showing Acura B2991?
No worries. We'll show you what it means and how to deal with it.

Presented by

Randy Worner

00:00/00:00

OVERVIEW

Severity

Medium

DIY Difficulty Level

Intermediate

Repair Cost

$75-$200

Can I Still Drive?

Yes (Short-term only)

What Does The Acura B2991 Code Mean?

This code indicates poor communication between the Climate Control Unit and the Audio Unit.

NOTE: Do the self-diagnostic function with the HDS.

Below are some potential causes of this DTC:

Loose wires or poor connections on the rear climate control panel and climate control unit circuit
“Open” or “Short in the wire(s) between the climate control unit and the audio unit.
Faulty Audio Unit
Faulty Climate Control Unit

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

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