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2018 Nissan Altima SV - ABS and Traction Control Lights On

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Mike T. · rep 0 · May 25, 1:55 AM · 1 replies · solved · Question

Vehicle: 2018 Nissan Altima SV

Hey everyone, I'm driving a 2018 Nissan Altima SV, and suddenly both my ABS and Traction Control warning lights came on the dashboard. They've been on for a couple of days now and haven't gone off.

The car seems to be driving fine, no weird noises or anything, but I'm concerned about these safety systems being disabled. I tried turning the car off and on, but the lights persist.

Has anyone experienced this with their Altima? What could be the cause, and is it safe to drive like this until I can get it looked at?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:55 AM

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ClearTheCode admin answer:

It's common for the ABS and Traction Control (TCS) lights to illuminate together, as these systems are interconnected and rely on similar sensors, primarily the wheel speed sensors.

Possible Causes:

  1. Faulty Wheel Speed Sensor: This is the most frequent cause. Each wheel has a sensor that monitors its rotational speed. If one fails or becomes dirty/damaged, the ABS/TCS module loses crucial data, disabling both systems and triggering the warning lights. A common OBD code for this is C1103 (Right Front Wheel Speed Sensor Malfunction) or similar codes for other wheels.
  2. Damaged Wiring/Connector: The wiring leading to a wheel speed sensor can get damaged due to road debris, corrosion, or wear, leading to intermittent or complete signal loss.
  3. ABS Module Failure: Less common, but a fault within the ABS control module itself can cause these lights to come on. This is usually a more expensive repair.
  4. Low Brake Fluid: While typically triggering a separate brake warning light, extremely low brake fluid can sometimes impact related systems.
  5. Steering Angle Sensor: A fault here can also affect TCS, as it needs to know steering input.

Initial Steps for Diagnosis:

  1. Check for OBD-II Codes: Even though these are ABS/TCS specific lights, a standard OBD-II scanner might pull some related codes, or a more advanced scanner can read ABS-specific codes. This is crucial for pinpointing which sensor or circuit is at fault.
  2. Visual Inspection: If safe to do so, inspect the wiring and connectors around each wheel for any obvious damage or corrosion.

When to See a Shop:

While the car may seem to drive normally, your ABS and Traction Control systems are disabled. This means your vehicle will not have the benefit of anti-lock braking in emergency stops, and traction control won't prevent wheel spin on slippery surfaces. This significantly impacts safety, especially in adverse weather conditions. You should schedule a visit to a mechanic as soon as possible to have the system properly diagnosed and repaired. A technician can accurately identify the faulty sensor or component and restore these critical safety features.

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