2016-2022 Infiniti Q60 ABS Light On: Common Causes and Fixes

By Core Brake Parts Tech Team — Circleville, OH warehouse

When the ABS warning light stays on in a 2016-2022 Infiniti Q60, the car's computer has found a fault in the anti-lock system and switched ABS off. Your regular brakes still work, but without anti-lock assistance, so the cause should be found soon. On this car the usual culprits are a wheel speed sensor or its wiring, a damaged encoder ring in a wheel bearing, low brake fluid, or worn or non-recommended brake parts upsetting the stability system.

How the ABS and VDC Systems Work on the Q60

The Q60 owner's manual describes the anti-lock system as a set of electronic sensors, electric pumps, hydraulic solenoids and a computer. The system reads the rotation speed of each wheel and varies brake fluid pressure so no single wheel locks up during hard braking or on slippery pavement. The manual states ABS works above roughly 3 to 6 mph, and when it acts you may feel pedal pulsation and hear noise from the actuator under the hood. That is normal.

The same wheel speed sensors and hydraulic unit feed the Vehicle Dynamic Control (VDC) system, which handles traction control, brake force distribution, active trace control and hill start assist. Because the systems share hardware, one bad sensor often lights up more than one warning at a time.

Every time you start the engine and roll away slowly, the ABS computer runs a self-test. The manual notes you may hear a "clunk" or feel a pulse in the pedal during that test, and that this is not a malfunction. If the self-test finds a fault, it turns ABS off and turns the ABS light on.

What the Warning Lights Are Telling You

The Q60 has several brake-related lights, and which ones are on together narrows the problem down fast.

A normal Q60 lights the ABS lamp briefly when the ignition is switched on and then turns it off. If it never goes out, or it comes on while driving, a fault code has been stored. The manual's warning is blunt: if the brake warning light is on, the brake system may not be working properly, and if the fluid is below the MIN mark you should not drive until it has been checked.

Common Causes of a Q60 ABS Light

1. Wheel speed sensor or harness damage

This is the most common cause. The Q60 uses active wheel speed sensors, which are powered by the ABS module and read a magnetic ring as the wheel turns. HELLA's technical guidance lists the typical failures as broken wires and internal shorts, outside mechanical damage, heavy contamination, excess wheel bearing play and damaged encoder rings. The harness near each wheel flexes with the suspension and is exposed to road salt and debris, so a chafed wire or corroded connector is as likely as a dead sensor.

2. Wheel bearing or encoder ring problems

On most modern cars the magnets the sensor reads are built into the inboard seal of the wheel bearing. If the bearing develops play, the gap between sensor and ring changes and the signal drops out, which can set a code or cause false ABS activation at low speed. A bearing installed with the encoder side facing the wrong way, or an encoder seal damaged during a brake or hub job, will do the same.

3. Metal debris on the sensor or encoder

The sensor tip and encoder are magnetic, so they collect brake dust and metal shavings. A layer of debris can corrupt the signal. This often shows up right after a rotor or pad job where grinding debris was left behind.

4. Low brake fluid

Low fluid primarily triggers the brake warning light, but a Q60 with low fluid and an ABS fault can show both. Brake pads wear, calipers extend and the fluid level drops slowly; a sudden drop points to a leak. The manual specifies Genuine NISSAN Super Heavy Duty Brake Fluid or equivalent DOT 3, filled to the MAX line, and says frequent topping-up means the system needs inspection.

5. Worn or mismatched brake and suspension parts

The owner's manual specifically warns that brake pads, rotors and calipers that are not recommended for the car or are badly worn can keep the VDC system from working properly and can turn the VDC warning light on. The same applies to non-recommended or worn shocks, springs, bushings and wheels. It also says to install the specified tire size on all four wheels, because mismatched tires turn at different speeds and confuse wheel-speed comparisons.

6. Low system voltage or module and actuator faults

A weak battery, a failing charging system or a poor ground can make control modules log faults at startup. Less often, the ABS actuator and control unit itself has failed. Rule out sensors, wiring and voltage before condemning the hydraulic unit, since it is the most expensive part in the system.

How to Diagnose It

1. Check the fluid first. Look at the reservoir under the hood. If it is below MIN, do not just top it off and drive; find out why it dropped. Inspect pads, hoses and calipers for leaks.
2. Read the ABS codes. A basic engine-code reader often cannot see the ABS module. Use a scan tool that reads chassis codes. The code usually names the wheel and whether the fault is an open circuit, a short or an implausible signal.
3. Watch live wheel speeds. As Brake & Front End explains, the wheel speed data on a scan tool shows exactly how the ABS module sees each sensor. On a slow test drive all four should read nearly the same. One that drops out, reads zero or jumps is the problem corner.
4. Inspect that corner. Pull the wheel. Look for a cut or stretched harness, a corroded connector and debris on the sensor tip. Check for wheel bearing play by rocking the tire at the top and bottom.
5. Check tires. Confirm all four tires are the specified size and similar in wear, especially if the light appeared after replacing one or two tires.

HELLA notes that the internal resistance of an active sensor cannot be measured with an ohmmeter the way older passive sensors could, so a scan tool or oscilloscope is the reliable test.

The Fix and What to Replace Together

Match the repair to the diagnosis:

• Sensor fault: replace the wheel speed sensor at the faulty corner, clean the mounting bore, route the cable exactly in the factory clips so it cannot rub, and tighten the bolt to the value in the factory service manual.
• Harness fault: repair or replace the damaged section and seal the connector.
• Bearing play or damaged encoder: replace the hub or bearing. The sensor alone will not fix a bad encoder ring.
• Fluid loss: fix the leak, refill with DOT 3 and bleed the system. A leaking caliper needs replacement; see our brake calipers and brake hoses.
• Worn brakes: if pads are at the wear limit or rotors are scored, replace them as a set per axle. For the Q60 we carry 2016-2022 Infiniti Q60 front ceramic brake pads, plus a full range of brake rotors and brake hardware kits.

Whenever you do a brake job near the sensor, keep the sensor tip and encoder clean, do not pry against the sensor, and clear all grinding debris before reassembly. After any repair, clear the codes and test drive with the scan tool connected to confirm the light stays off.

How Hard Is the Job?

Checking fluid and reading codes is easy for any owner with a chassis-capable scan tool. Replacing a wheel speed sensor is a moderate DIY job: wheel off, one connector, one bolt, careful cable routing. The hardest part is usually a sensor seized in its bore by corrosion. A hub or bearing replacement is a step up and needs proper tools and torque values from the service manual. Diagnosis of the ABS actuator and control unit, and any bleeding that requires cycling the ABS pump, is best left to a shop with dealer-level software. Until the fault is fixed, drive gently and leave extra following distance, because the car will stop without anti-lock or stability assistance.

Frequently Asked Questions

Is it safe to drive a Q60 with the ABS light on?

With only the ABS light on, the owner's manual says the brakes operate normally but without anti-lock assistance. You can drive carefully to a repair, but wheels can lock in a hard stop. If the red brake warning light is also on, or the fluid is below MIN, do not drive until it is checked.

Why did the ABS and VDC lights come on at the same time?

Both systems use the same wheel speed sensors and hydraulic unit. When ABS detects a fault it shuts off, and VDC, traction control and brake force distribution fall back to fail-safe mode, so both lights come on. One repair usually clears both.

Can new brake pads cause the ABS light?

Pads themselves do not report to the ABS module, but a brake job can disturb the sensor, its wiring or the encoder, or leave metal debris on them. The manual also warns that non-recommended or badly worn pads, rotors and calipers can keep VDC from working correctly.

Will disconnecting the battery clear the ABS light?

It may turn the light off briefly, but the self-test runs every time the car moves off. If the fault is still there, the light returns. Fix the cause, then clear the code.

Has the Q60 had an ABS actuator recall?

A query of NHTSA recall data for the 2016-2022 Q60 at the time of writing showed no brake or ABS recalls for this model. The widely reported Infiniti ABS actuator recall applies to the QX60 SUV, a different vehicle. Run your VIN on the NHTSA recall lookup to be sure for your car.

What brake fluid does the Q60 use?

The owner's manual specifies Genuine NISSAN Super Heavy Duty Brake Fluid or an equivalent DOT 3 fluid, filled to the MAX line on the reservoir.

Sources

1. 2018 INFINITI Q60 Owner's Manual - ABS, brake and VDC warning light meanings, ABS self-test and operating speed, DOT 3 fluid spec, warning about non-recommended brake and suspension parts, tire size requirement
2. HELLA Tech World: Check and change ABS and wheel speed sensors - active sensor operation, failure causes, testing and replacement precautions
3. Brake & Front End: Wheel speed sensors and bearings - encoder rings in bearing seals, air gap and bearing play, debris, scan tool wheel speed data
4. NHTSA recall data, Infiniti Q60 - no brake or ABS recalls listed for the Q60 model years checked