Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power Windows DTCS
's Power Window Motor Pulse A Error DTC B2176 Driver's Power Window Motor Pulse B Error DTC B2177 Front Passenger's Power Window Motor Pulse A Error DTC B2178 Front Passenger's Power Window Motor Pulse B Error DTC B2187 Communication Line (UART Line) Driver's MPCS Unit cannot send UART messages. DTC B2188 Communication Line (UART Line) Driver's MPCS Unit cannot receive UART messages from Front Passenger's MPCS Unit. DTC B2189 Driver's Power Window Position Detect Circuit Error DTC B2190 Front Passenger's Power Window Position Detect Circuit Error DTC B2191 Front Passenger's MPCS Unit Internal (EEPROM) Error
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.