You’re driving your Chevy Traverse, probably thinking about groceries or the carpool schedule, when suddenly a yellow warning pops up on your dash: “Power Steering Assist Fault.” Your steering wheel might feel heavier, or maybe it’s just the message staring at you while everything seems fine. Either way, it’s unsettling.
This fault message shows up when the electronic power steering system detects something wrong with how it’s helping you turn the wheel. Modern vehicles like the Traverse use electric power steering instead of the old hydraulic pumps, which means fewer moving parts but more reliance on sensors, modules, and electrical connections. When any piece of that system hiccups, you get the warning.
Common Causes
The power steering assist fault in a Chevy Traverse usually comes down to a handful of culprits. Some are simple fixes. Others need more attention.
Failing Power Steering Control Module
This is the brain of your steering system. It sits near the steering column and controls how much assist the electric motor provides. These modules have a known failure rate in Traverse models, especially the 2009-2017 generation. When it starts dying, you’ll get intermittent faults or complete loss of assist.
Bad Battery or Charging System
Electric power steering needs consistent voltage to work properly. If your battery is weak, your alternator isn’t charging right, or you have corroded terminals, the steering module won’t get clean power. I’ve seen this cause the fault more times than I can count. Sometimes it’s that simple.
Faulty Steering Position Sensor
The system needs to know where your wheels are pointed. A worn or glitchy position sensor sends bad data to the control module, triggering the fault. This sensor lives inside the steering column and wears out over time.
Wiring or Connector Issues
Corrosion, loose pins, or damaged wires between the steering module and other components can interrupt communication. Water intrusion is common in these connections, especially if you live somewhere with harsh winters and road salt.
Software Glitch
Sometimes the module just needs a reset or software update. GM has issued technical service bulletins for certain model years addressing calibration issues that cause false warnings.
How to Diagnose the Problem
Start with the basics before you assume the worst. You’ll need an OBD-II scanner that can read chassis codes, not just engine codes. A basic one from Amazon works fine for this.
Check for Diagnostic Codes
Plug in your scanner and pull the codes. You’re looking for C-codes (chassis) that relate to the steering system. Common ones include C0460, C0495, C0545, or U codes indicating communication problems. Write down everything you see.
Test Your Battery
Use a multimeter to check battery voltage. You want to see 12.4-12.6 volts with the engine off, and 13.5-14.5 volts with it running. Anything less means you have a charging problem. Also check the terminals for corrosion. Clean them with a wire brush if needed.
Wiggle Test
With the key in the “on” position (engine off), wiggle the wiring harness near the steering column. If the warning light flickers or changes, you’ve got a loose connection. Check under the dash near the pedals where the control module usually sits.
Listen for Noises
Turn the wheel lock to lock while parked. If you hear grinding, clicking, or any unusual sounds, the electric motor or gears inside the column might be damaged. Dead silence is what you want.
This video walks through diagnosing power steering issues in GM vehicles:
Check for Patterns
Does the warning only appear in cold weather? After hitting a bump? When turning hard? Patterns tell you a lot. Cold-start issues often point to the control module. Bump-related faults suggest wiring problems.
How to Fix It
Some fixes you can handle at home. Others require tools and patience.
Reset the System
This sounds too easy, but try it first. Disconnect the negative battery cable for 15 minutes. This clears adaptive memory and can reset a glitchy module. Reconnect and see if the fault returns. If it stays away, you just saved yourself a bunch of money.
Clean Battery Connections
Remove both battery cables and clean the terminals and cable ends with a wire brush. Corrosion creates resistance, which messes with voltage. Reinstall everything tight. This fixes more electrical gremlins than people realize.
Repair Wiring Issues
If you found a loose or corroded connector during your wiggle test, fix it. You can buy dielectric grease and electrical contact cleaner to protect connections. For damaged wires, solder and heat shrink are your friends. Don’t just twist wires together and hope.
Replace the Power Steering Control Module
If your diagnostics point to a failed module, replacement isn’t terrible but it’s not simple either. The module usually sits behind the lower dash panel near the brake pedal. You’ll need to remove some trim, disconnect the wiring harness, unbolt the old module, and install the new one. The part runs $200-400 depending on where you buy it. After replacement, some vehicles need the module programmed by a dealer or shop with the right software.
Replace the Steering Position Sensor
This lives inside the steering column, so you’re removing the lower column covers and potentially the clockspring. If you’re comfortable with steering column work, it’s doable. If not, this is where many people call a shop. The sensor itself is relatively cheap, but labor adds up if you’re paying someone.
Update Software
Check with a Chevy dealer about technical service bulletins for your specific model year. Some steering assist faults are fixed with a simple software flash. Dealers charge for this, but it beats replacing parts that aren’t actually broken.
When to See a Mechanic
If you’ve checked the battery, cleaned connections, and reset the system but the fault keeps coming back, it’s time for professional help. Diagnosing electrical issues without proper tools gets expensive fast when you’re guessing.
Take it to a shop if you’re getting multiple codes that don’t make sense together, or if the steering feels physically wrong when you drive. Grinding noises, binding, or complete loss of assist while moving are safety issues that need immediate attention.
Also, if the fix requires steering column disassembly or module programming, most home mechanics will want a professional handling that. Messing up anything related to your airbag system (which you’ll be near when working in the column) isn’t worth the risk.
Estimated Repair Costs
| Repair Type | DIY Cost | Shop Cost |
|---|---|---|
| Battery cleaning/terminal replacement | $10-30 | $50-100 |
| Wiring repair | $20-50 | $100-250 |
| Control module replacement | $200-400 | $500-900 |
| Steering position sensor | $80-150 | $250-500 |
| Software update/reflash | N/A | $100-200 |
| Full diagnostic | $50 (scanner) | $100-150 |
These are ballpark figures. Dealer prices run higher than independent shops. The control module is the most common fix and falls in that $500-900 range at a shop including parts and labor.
Prevention Tips
You can’t prevent every electrical failure, but you can reduce the odds.
Keep your battery and charging system healthy. Test your battery annually and replace it before it dies completely. Weak batteries stress every electrical component in your vehicle.
Protect electrical connections from moisture. If you live in a salt belt state, occasionally spray exposed connectors under the dash with dielectric grease. It creates a barrier against corrosion.
Address warning lights quickly. If you get the power steering fault message and it goes away on its own, don’t ignore it. That’s the system telling you something is failing intermittently. Catching it early usually means cheaper repairs.
Avoid aftermarket electrical accessories that tap into your vehicle’s power without proper fusing and wiring. Voltage spikes and drops from poorly installed electronics can damage sensitive modules.
If you’re working under the dash for any reason, be gentle with connectors and wiring. These plastic clips and pins get brittle with age. One wrong move can create the exact problem we’re discussing here.
The power steering assist fault on your Chevy Traverse is annoying, but it’s usually fixable without breaking the bank. Start with the simple stuff like battery health and connections before jumping to expensive parts. Most of the time, you’ll find the problem falls into that manageable middle ground between “five minute fix” and “shop job.” And if you do end up needing a new control module, at least you’ll know that’s actually the problem instead of throwing parts at it and hoping.
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