Are you experiencing problems with the All-Wheel Drive system of your Subaru? Beginning to see warning lights flash, hearing strange noises, or feeling the car pull to one side? A major system of many Subaru models, the all-wheel drive (AWD) system, provides grip, stability, and control for your vehicle on various terrain. If there is a malfunction in the system, it may cause problems with your car’s handling, impacting your safety and the safety of your passengers.
Thankfully, most AWD system errors can be identified and solved with proper maintenance and repair. Here is a list of the most common reasons for failure in AWD systems, and the ways to address them.
Common Causes of Subaru AWD System Errors
There are several problems that could cause Subaru AWD system errors. Uneven wear on your tires can put a lot of pressure on the drivetrain and result in system failure. Low or dirty transmission fluid can also impact the AWD, hampering the power distribution and performance. Even a simple damaged wheel speed sensor can affect the operation of the traction control system and the ABS, causing your AWD warning lights to come on. Issues like faulty fuses or damaged wires can also render the system useless and needing further examination and repair.
How to Fix Subaru AWD System Issues
- Monitor the AWD Warning Light: This light notifies you when your Subaru has a problem with its all-wheel drive system, with some models showing messages such as ‘AWD Disabled’ or ‘Check AWD System’. A diagnostic scan tool can reveal the specific code that set off the warning light, meaning a trained technician will know exactly what the issue is.
- Check your tires: All of your tires should be of the same size and brand, and should also have the same tread depth. If one tire has more wear than the others, it is recommended to replace all four tires to avoid affecting the AWD. You might also need to make sure to have your tires balanced for better handling and proper working of the AWD system.
- Change the Transmission Fluid: In some cases, the AWD may be affected by low or dirty transmission fluid. Look at the quantity and color—it should be either red or pink and the odor should not be burnt. If it looks dark or low, it should be changed or refilled to guarantee your AWD system functions properly.
- Check AWD Solenoid and Control Valve: A faulty solenoid or control valve can affect the power distribution and result in AWD failure. This part is located within the transmission and will need the attention of a trained technician. If the solenoid is faulty, it will need to be replaced to ensure the functionality of the system.
- Replace Wheel Speed Sensors: If there are ABS or traction control warning lights coming on along with the AWD warning lights, it could be due to dirty or damaged wheel speed sensors. In some cases, simply cleaning the sensors is the easy solution, but if the issue remains constant, the sensors may need to be replaced.
- Check the Center Differential and Transfer Clutch: Any grinding or clunking sound while turning could mean that the center differential or transfer clutch is wearing out. These important components in your power transmission should be looked at by professionals to avoid further damage to the drivetrain.
- Inspect Fuses and Wiring: A malfunctioning fuse can turn off the system entirely. Check your fuse compartment, and have any blown or faulty fuses replaced. If the problem persists, there could be a problem in your wiring. A diagnostic inspection will be able to pinpoint the issue.
Get The Best Subaru Repair Services From Dieter’s Porsche & BMW Service
If you have concerns about your Subaru’s AWD system, Dieter’s Porsche & BMW Service in San Diego, CA is ready to assist you. Our team is ready to focus on the diagnosis and repair of your AWD system so that your Subaru will perform optimally on any terrain. We are happy to welcome clients from San Diego, Coronado, Mission Valley, and Chula Vista, and Point Loma in California. Get in touch with us today for an appointment!
* Yellow Subaru Car image credit goes to: Brandon Woyshnis.