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2024 Integra LKAS/ACC Malfunction Light - Intermittent Issues

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Mark S. · rep 0 · May 25, 3:42 AM · 1 replies · solved · Question

Vehicle: 2024 Acura Integra A-Spec w/ Technology Package

I just got a new 2024 Acura Integra A-Spec with Technology Package, and I'm already seeing an issue with the advanced driver-assist systems. The Lane Keeping Assist System (LKAS) and Adaptive Cruise Control (ACC) sometimes show a "Malfunction" warning on the dash and then stop working.

It's intermittent, usually happening on longer drives or in specific weather conditions, but it's not consistent. When it happens, the systems become unavailable. The dealership said they couldn't replicate the issue during their brief test drive, which is frustrating.

What could be causing this in a brand new car? Is this a common problem, and what should I tell the dealership to look for?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:42 AM

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ClearTheCode admin answer:

It's concerning to experience intermittent ADAS (Advanced Driver-Assistance Systems) malfunctions on a brand new 2024 Acura Integra A-Spec. These systems, like LKAS and ACC, rely on precise sensor data, and an intermittent fault can be tricky to diagnose.

Here are the common causes and what to consider:

  1. Sensor Obstruction or Calibration:

    • Cause: LKAS typically uses a camera mounted behind the rearview mirror, and ACC uses a radar unit in the front grille. Even minor dirt, frost, or debris on the windshield (for the camera) or the front bumper (for the radar) can temporarily obstruct their view and cause a malfunction. Sunlight glare can also affect the camera.
    • Solution: Ensure the windshield area in front of the camera and the radar sensor in the grille are always clean.
    • Calibration: If a sensor was bumped or misaligned during manufacturing or transit, it might need recalibration. This requires specialized equipment at the dealership.

  2. Wiring or Connector Issues:

    • Cause: Loose or damaged wiring harnesses connecting the camera, radar unit, or the ADAS control module can lead to intermittent communication failures.
    • Diagnostics: This would typically be checked by a technician, looking for continuity and secure connections.

  3. Software Glitch:

    • Cause: Like any complex electronic system, the ADAS module's software can have bugs that manifest as intermittent faults. Environmental factors (temperature, humidity) can sometimes trigger these glitches.
    • Solution: Check for available software updates for the ADAS control module at the dealership.

  4. OBD Codes:

    • Even if the light is intermittent, the system often stores a 'history' or 'pending' diagnostic trouble code (DTC). Common codes for ADAS issues can include U0401 (Invalid Data Received from ECM/PCM A) or more specific codes related to the camera or radar units (e.g., B-codes or C-codes).

When to See a Shop: Since the dealership couldn't replicate it, document everything: date, time, weather conditions, speed, and what you were doing when the malfunction occurred. Show them any photos or videos if possible. Insist they perform a deep scan for all stored and pending codes, not just active ones. They should specifically check the ADAS control module and related sensors. If a software update is available, request it. Given it's a new car, this should be fully covered under warranty, and they should persist until the issue is resolved for your safety and peace of mind.

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