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2017 MDX Power Tailgate Not Opening/Closing Smoothly

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David L. · rep 0 · May 26, 3:55 AM · 1 replies · solved · Question

Vehicle: 2017 Acura MDX Base

My 2017 Acura MDX Base model is having issues with its power tailgate. Lately, it's been very inconsistent. Sometimes it opens halfway and stops, other times it struggles to close, making a grinding or straining noise before eventually latching.

It's not happening every single time, but it's frequent enough to be annoying and concerning. I've tried manually opening and closing it, and it feels a bit stiff. There are no obvious obstructions, and I keep the area clean. I'm worried it might get stuck completely.

Has anyone else experienced this with their 2017 MDX? What was the cause of your power tailgate malfunction, and what kind of repair was needed? Any tips or things to check before I head to the dealership would be great.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:55 AM

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ClearTheCode admin answer:

Power tailgate malfunctions on vehicles like your 2017 Acura MDX Base can be attributed to several components working in conjunction. The grinding noise and inconsistent operation suggest a mechanical or motor-related issue. Here's what could be going on:

  1. Failing Liftgate Struts/Actuators: The power struts contain motors and gears that assist in opening and closing the tailgate. Over time, these can wear out, causing the tailgate to struggle, stop prematurely, or make noise.

    • Action: Listen closely to identify which side the grinding noise is coming from. Visually inspect the struts for any signs of fluid leaks or damage.

  2. Power Liftgate Motor: The main motor that drives the tailgate mechanism could be weakening or failing. This would directly impact its ability to open and close smoothly.

    • Diagnostics: A diagnostic scan might reveal codes such as B2280 (Power Liftgate Motor Circuit Malfunction) if there's an electrical issue with the motor.

  3. Obstruction Detection System: The tailgate has sensors to detect obstructions. If these sensors are faulty or miscalibrated, they might falsely detect an obstruction and stop the tailgate's movement.

    • Action: Ensure the rubber seals and edges of the tailgate are clean and free of debris. Try resetting the tailgate's memory by manually closing it and then attempting to open it with the power function.

  4. Wiring or Electrical Issues: Damaged wiring or a faulty control module for the power tailgate can interrupt power or signals, leading to erratic behavior.

    • Action: This typically requires professional diagnosis to trace electrical circuits.

  5. Hinges or Latches: Worn hinges or a misaligned latch can cause binding and resistance, making the power system work harder and potentially leading to grinding noises.

    • Action: Lubricate the hinges and check for any play or misalignment in the tailgate when it's open.

When to See a Shop: If lubricating hinges and checking for obvious obstructions doesn't resolve the problem, it's best to take your 2017 MDX to an Acura dealership or a reputable independent mechanic specializing in electrical systems. Diagnosing power tailgate issues often requires specialized tools to test motor function, sensor inputs, and control module operation. Continuing to use a struggling power tailgate can lead to complete failure or damage to other components, resulting in a more expensive repair.

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