SH AWD Light On Acura MDX [Explained & Quick Fixes]

The SH-AWD light on the Acura MDX is a crucial indicator of the vehicle’s Super Handling All-Wheel Drive system’s performance. When this light appears on your dashboard, it may signal that there is an issue with the system, which can affect the vehicle’s traction and overall handling, especially in challenging driving conditions. As an owner of the Acura MDX, I’ve experienced this firsthand. 

The SH-AWD system is designed to distribute power to the wheels that need it most, ensuring better control and stability. When the light turns on, it’s a clear sign to check the system for potential issues, whether it’s a malfunction or just a need for regular maintenance. 

What Does the SH-AWD Warning Light on Acura MDX Mean?

If the SH-AWD light comes on in your Acura MDX, it signals a potential issue with the all-wheel-drive system. This system relies on the Electronic Control Unit (ECU) to manage the distribution of power to the front and rear wheels. When the light appears, it could indicate a problem with several components, including the front differential, fluid levels, or even the differential oil. 

Sometimes, it may point to a malfunction in the gearbox control module, TCM, or sensors, like speed sensors that help monitor the vehicle’s traction and stability. Electrical issues, such as a bad sensor, a faulty battery, or even problems in the wiring harness, could also trigger this warning light. As an experienced driver, I know that ignoring the SH-AWD light can lead to further complications, such as reduced handling performance on slippery roads. 

It’s also important to consider tire problems, like improper tire inflation, wheel misalignment, or irregular tire wear, which can affect the system’s function. To get a proper diagnosis and ensure the MDX remains reliable, it’s best to have an expert mechanic check the system and resolve any underlying issues. 

How to Fix SH-AWD Light on Acura MDX

1. Sensor Inspection and Check-Up

One of the first things to do when you notice the SH-AWD light on your Acura MDX is to check the sensors. The sensor issues often trigger the warning light, and they play a crucial role in how the all-wheel-drive system operates. These sensors monitor the distribution of power to the front wheels and rear wheels, ensuring the system works correctly. 

If a bad sensor or malfunctioning speed sensor is causing the issue, it will affect the system’s performance and could lead to more severe damage over time. In my experience, a simple sensor check-up by an expert mechanic can often resolve the issue and prevent further complications.

 If a sensor is faulty or damaged, it may need to be replaced to restore proper functioning. It’s always a good idea to have a professional diagnose the problem thoroughly to ensure no other parts of the system are affected.

2. Professional Evaluation by an Expert Mechanic

If the SH-AWD light stays on, it’s time for an expert evaluation. A skilled mechanic can check key components like the ECU, front differential, and gearbox control module, as well as inspect the wiring harness and TCM for issues. Electrical problems, such as a bad sensor or battery connection, can also trigger the light.

 In my experience, a professional diagnosis ensures the issue is identified quickly and accurately, preventing further damage to the all-wheel-drive system.

3. Fix Broken Parts:

If the SH-AWD light stays on, you may need to focus on damaged sensors or broken wires. Over time, wires and devices can break, causing an issue with the wiring or sensors that affects the system’s performance. The first step is to have the damaged sensors identified and check the wiring for any visible problems. 

Replacing the faulty devices or wires can resolve the issue and return the system to its normal function. Regular repair of damaged parts ensures that the SH-AWD system works smoothly.

4. Choosing Replacement to Save Time and Money

When dealing with a persistent issue like the SH-AWD light, sometimes the problem is caused by faulty wiring or a broken sensor. Instead of repairing individual components, replacing the entire unit can be a more efficient and cost-effective solution. This approach ensures that all issues are fixed properly without wasting unnecessary resources. By addressing the problem with the right replacement parts, you can save time and money in the long run. This technique prevents future breakdowns and keeps your system running smoothly.

Acura’s Steering Wheel and Brakes Locked Up: Car Won’t Start

If your Acura’s steering wheel and brakes are locked, it can prevent the car from starting. In this situation, you might need to gently turn the steering wheel in the direction where it’s locked, while also pressing the brake pedal. If the engine still doesn’t start, try pressing the push start button again, ensuring you hold it for a few seconds. 

Sometimes, if this happens with models like the Acura TL or Acura RDX, the steering wheel can be unlocked and the brakes can be released by slowly moving the car to its original position. If the issue persists and the vehicle still won’t start, it may need to be towed to an auto repair shop or checked by a mobile mechanic.

Acura Shows “SH-AWD Diff Temp High” After Driving for a While 

If your Acura shows “SH-AWD Diff Temp High” after driving for a while, it’s usually a sign of overheating in the differential fluid. This issue can lead to damaging the internal transmission parts and vital components, such as the torque converter. To prevent further damage, you should pull over and shift the car to park mode, allowing the engine idle to help cool down the system.

 If the light turns off after a few minutes, the issue might be temporary, but it’s important to avoid sudden starts and stops, as well as racing the engine. In hot weather or heavy traffic, the coolant temperature can rise, affecting the SH-AWD system, especially if your Acura RDX or other models are already prone to transmission problems. Make sure to monitor these signs to prevent long-term damage.

A Strange Noise from Acura SH-AWD’s Differential Area

If you hear a strange noise coming from the Acura MDX’s differential area, it could be a sign of low differential fluid or dirty differential fluid. A gear grinding sound or vibration may also indicate that the differential gears are starting to wear out. This can lead to further damage in the rear differential and driveshaft.

 To fix it, you may need to top up or flush the differential fluid, then refill with fresh fluid. If there are leaks, replace the differential seals and gaskets to prevent further problems. If the issue is not resolved quickly, it could cause more damage, so it’s important to check the SH-AWD system and visit an auto repair shop to have it fixed.

How Much Does It Cost to Repair the Check SH All-Wheel Drive System on an Acura?

When you see the Check SH All-Wheel Drive System light on your Acura MDX, the cost to repair it can vary widely depending on the issue. Minor fixes like topping up or flushing differential fluid may cost around $100-$200. However, if the problem involves replacing differential seals, gaskets, or major components of the differential gear or driveshaft, the cost can rise to $1,000 or more.

 Labor charges and the need for specialized parts, especially if vital fluids need to be replaced, can add to the cost. Based on my experience, it’s best to get an expert mechanic to check the system early, as repairing minor issues early can help save you money in the long run by avoiding more expensive repairs.

Repair Type	Estimated Cost
Topping up or flushing differential fluid	$100 – $200
Replacing differential seals or gaskets	$300 – $600
Replacing differential gear or driveshaft	$600 – $1,000+
Labor charges (diagnostics and repairs)	$100 – $150 per hour
Total cost (for major repairs)	$1,000 – $2,500+

 

FAQS

What is the SH-AWD indicator light on my Acura MDX?

The SH-AWD indicator light on your Acura MDX appears when there’s a problem with the SH-AWD system. It means the system is not functioning properly, and your vehicle is only using front-wheel drive with vehicle stability assist (VSA).

If the light stays on or shows an SH-AWD message on the multi-information display, it indicates an issue that needs to be checked by a mechanic.

Is it safe to drive with SH-AWD light on?

If the SH-AWD light is on or blinks while driving, it could indicate that the differential temperature is too high. In this case, it’s not safe to continue driving. You should pull over to the side of the road when it’s safe, shift to park, and idle the engine until the indicator goes out.

If the temperature remains high or the light keeps blinking, it’s best to get the vehicle checked to prevent further damage.

What do I do if my AWD light comes on?

If the AWD light comes on, pull over to a safe place, shift to park, and idle the engine until the indicator goes off. If the light stays on or keeps blinking, it may indicate a problem like high differential temperature. In this case, it’s best to have your vehicle checked by a mechanic.

Does AWD turn on automatically?

Yes, AWD in your vehicle turns on automatically when needed. You don’t need to engage it manually. Some vehicles may have an AWD Lock button, which locks the system into a 50/50 distribution of power between the front wheels and rear wheels.

 This ensures that the power distribution is balanced, but for normal use, the all-wheel drive system engages automatically based on driving conditions.

How do you know if your AWD is working?

The easiest way to check if your AWD is working is to have someone watch the front wheels while you accelerate. If the system is functioning, you’ll see both the front wheels and rear wheels spinning and kicking up snow or debris. 

This means the front axles and rear axles are properly delivering torque to all four wheels, ensuring the vehicle performance is as expected.