Acura B2178: Front Passenger's Power Window Motor Pulse B Error

Is your scanner showing Acura B2178?
No worries. We'll show you what it means and how to deal with it.

Presented by
Randy Worner

Acura B2178: Front Passenger's Power Window Motor Pulse B Error

OVERVIEW
Severity
:
Medium
DIY Difficulty Level
:
Advanced
Repair Cost
:
$250-$510
Can I Still Drive?
:
Yes (Short-term only)

What Does The Acura B2178 Code Mean?

This code indicates Front Passenger’s Power Window Motor 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 B2178 Code?

Below are some potential causes of this DTC:

  • Check for loose or poor connections
  • “Open” or “Short” Condition between the Front Passenger’s Power Window Motor and the Front Passenger’s MPCS Unit
  • Faulty Front Passenger’s Power Window Motor
  • Faulty Front Passenger’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
>>> Front Right Passenger Side Power Window Regulator with Motor

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

Reference Sources

Acura B2178, DTCDECODE.

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