Acura B2179: Driver's Door Key Cylinder Switch LOCK/UNLOCK Signal Error

Is your scanner showing Acura B2179?
No worries. We'll show you what it means and how to deal with it.

Presented by
Randy Worner

Acura B2179: Driver's Door Key Cylinder Switch LOCK/UNLOCK Signal Error

OVERVIEW
Severity
:
Medium
DIY Difficulty Level
:
Intermediate
Repair Cost
:
$200-$300
Can I Still Drive?
:
Yes

What Does The Acura B2179 Code Mean?

Driver’s Door Key Cylinder Switch malfunction.

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

What Are The Potential Causes Of The Acura B2179 Code?

  • Check for loose or poor connections
  • “Open” or “Short” condition between the Driver’s Door Key Cylinder Switch and the Driver’s MPCS unit
  • Faulty door lock switch bulb
  • Faulty Driver’s Door Key Cylinder Switch; replace the driver’s door lock actuator assembly
  • Faulty Driver’s MPCS unit

Recommended Parts

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

>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> Acura Under-dash Fuse/Relay Box
>>> Power Door Lock Actuator w/Latch Assembly Fits for Acura MDX TL TSX Front Left/Driver's Door 72046A

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

Reference Sources

Acura B2179, DTCDECODE.

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