There’s nothing like the sinking feeling you get miles down a trail when a warning light flashes on your dash. Your steering suddenly feels like you’re wrestling a bear, and a cryptic message—polaris code 746 4—is the only clue you have. It’s a moment that can ruin a perfect day of riding.
But what if I told you that this intimidating code is often caused by a surprisingly simple issue you can likely fix yourself with basic tools? Forget the immediate dread of a massive repair bill or a long wait at the dealership.
In this complete guide from FatBoysOffroad, we’re going to demystify this common fault code. We’ll walk you through exactly what it means, the most frequent culprits, and a step-by-step process to diagnose and fix the problem, getting you back in control and back on the trail with confidence.
What is Polaris Code 746 4, Really? (And Why You Shouldn’t Panic)
First, let’s break down the technical jargon into plain English. When your Polaris machine displays this error, it’s giving you two pieces of information: the Suspect Parameter Number (SPN) and the Failure Mode Identifier (FMI).
- SPN 746: This points directly to the Electronic Power Steering (EPS) system’s control circuit.
- FMI 4: This specifies the type of fault. In this case, it means “Voltage Below Normal, or Shorted to Low Source.”
So, when you see polaris code 746 4, your machine is telling you: “Hey, the Electronic Power Steering unit isn’t getting the stable voltage it needs to work correctly.”
This is actually good news! It means the expensive EPS unit itself is often perfectly fine. The problem is almost always in the electrical supply chain leading to it, which is much easier and cheaper to fix.
The Usual Suspects: Common Problems Causing Code 746 4
Before you start tearing things apart, let’s focus on the most common culprits. In our experience, over 90% of these codes trace back to one of the following issues. This is a core part of any good polaris code 746 4 guide—start with the simple stuff first.
The Number One Culprit: Low Battery Voltage
Your machine’s EPS unit is a power-hungry component. If your battery’s voltage drops, the EPS is one of the first systems to complain. A battery that can still start the engine might not have enough stable power to keep the EPS happy, especially under load.
The Corroded Connection: Dirty or Loose Battery Terminals
It doesn’t matter how good your battery is if the power can’t get out. A thin layer of corrosion or a slightly loose terminal bolt can create massive electrical resistance, starving the EPS unit of the voltage it needs and triggering the code.
The Hidden Gremlin: A Bad Ground Connection
Electricity needs a complete circle to flow. The ground wire—running from the battery’s negative terminal to the vehicle’s frame—is just as important as the positive wire. A loose, rusty, or corroded ground point is one of the most overlooked causes of frustrating electrical problems.
Frayed and Frazzled: A Damaged Wiring Harness
Your Polaris gets subjected to mud, water, vibration, and impacts. Over time, the wiring harness leading to the EPS unit can get rubbed, pinched, or corroded. A damaged wire can cause a short or an intermittent connection, leading directly to that FMI 4 fault.
How to Fix Polaris Code 746 4: Your Step-by-Step Guide
Alright, time to get your hands dirty. Follow these steps methodically. This is how to polaris code 746 4 diagnosis and repair is done in the shop. Don’t skip a step, as the problem is often found in the first ten minutes.
Safety First: Before you begin, park your machine on a level surface, turn it off, and remove the key. Always wear safety glasses and gloves when working with batteries.
Step 1: Gather Your Tools
You don’t need a full professional toolbox for this job. Grab a few key items:
- Digital Multimeter: This is non-negotiable for any electrical diagnosis.
- Socket and Wrench Set: You’ll need it for the battery terminals and ground points (commonly 10mm or 13mm).
- Wire Brush: A small, stiff brush is perfect for cleaning corrosion.
- Battery Terminal Cleaner Tool: An inexpensive but highly effective tool.
- Dielectric Grease: To protect your clean connections from future corrosion.
Step 2: The Voltage Check (Your First Diagnostic)
Your multimeter will tell you the story. Set it to DC Volts (V–).
- Static Test: With the machine off, touch the red probe to the positive (+) battery terminal and the black probe to the negative (-) terminal. A healthy, fully charged battery should read at least 12.4 volts. Anything less, and your battery is either discharged or failing.
- Running Test: Start the engine. Re-test the battery terminals. The reading should now jump to somewhere between 13.5 and 14.5 volts. If it doesn’t, your machine’s charging system (stator or voltage regulator) may have a problem.
If either of these tests fails, you’ve likely found your culprit. Charge or replace the battery before continuing.
Step 3: Clean and Secure Your Connections
Even if the voltage looks okay, perform this step. It’s a critical part of any good polaris code 746 4 care guide.
- Disconnect the negative (-) battery cable first, then the positive (+).
- Use your wire brush or terminal cleaner to scrub the battery posts and the inside of the cable terminals until they are shiny bare metal.
- Reconnect the positive (+) cable first, then the negative (-). Tighten the bolts so they are snug and unmovable by hand.
- Apply a thin layer of dielectric grease over the outside of the connections to seal out moisture.
Step 4: Hunt Down the Grounds
Follow the main negative battery cable to where it bolts to the frame. This is your main ground. Remove the bolt, and use your wire brush to clean the cable lug, the bolt, and the frame surface until they are all free of paint, rust, and grime. Re-secure it tightly.
Your EPS unit may also have its own smaller ground wire. Consult your service manual to locate it and give it the same cleaning treatment.
Step 5: Inspect the EPS Wiring Harness
Trace the wires coming from the EPS unit itself. Look closely for any areas where the harness might be rubbing against the frame, a shock, or the engine. Check the main connector plug at the EPS unit for any signs of mud, water, or green/white corrosion on the pins. If you find any, clean them carefully with an electrical contact cleaner.
Step 6: Clear the Code and Test Ride
After performing these checks, the code will often clear itself once the voltage is stable. You can typically force a reset by turning the ignition on and off a few times. Start the machine and see if the EPS light goes out and your power steering returns. Take it for a short, slow test ride to confirm the fix is solid.
Proactive Power: Polaris Code 746 4 Best Practices for Prevention
Fixing the problem is great, but preventing it is even better. Adopting these habits will dramatically reduce your chances of seeing this code again. A sustainable fix involves addressing the root cause and preventing its return.
Implement a Regular Battery Maintenance Routine
During the off-season or long periods of storage, connect your machine to a quality battery tender. This keeps the battery optimally charged and dramatically extends its life. This is also a more eco-friendly polaris code 746 4 approach, as you’ll be replacing fewer batteries over the life of your machine.
Keep it Clean: The Importance of Electrical Hygiene
Every time you wash your rig, take an extra two minutes to check your battery terminals. Make cleaning your grounds and major electrical connections part of your annual service routine.
Protect Your Wiring
When adding accessories, be mindful of how you route wires. Use zip ties to secure them away from hot exhaust pipes and sharp frame edges. Use protective wire loom for any wires in high-risk areas.
Benefits of Fixing Polaris Code 746 4 the Right Way
Taking the time to follow this polaris code 746 4 guide offers more than just a quick fix. The benefits are significant.
- Restored Safety and Control: Properly functioning power steering is a critical safety component, especially in technical terrain.
- Prevents Further Damage: Ignoring a voltage problem can lead to stress on other expensive electronic components, like the ECU or voltage regulator.
- Saves You Money: You can avoid costly diagnostic fees and parts markups at a dealership for what is often a five-minute fix.
- Builds Confidence: There’s no better feeling than successfully troubleshooting and fixing your own machine. It empowers you for future challenges.
Frequently Asked Questions About Polaris Code 746 4
Can I still ride my Polaris with code 746 4 active?
Technically, you might be able to, but it’s not recommended. You will have no power steering, making the machine extremely difficult and fatiguing to control, which is a major safety hazard. The underlying electrical issue could also worsen, potentially leaving you stranded.
Will a new battery automatically fix code 746 4?
Not necessarily. If the root cause is a corroded terminal or a bad ground, a brand-new battery won’t solve the problem because the power still can’t get where it needs to go. This is why following the full diagnostic process is so important.
Where is the EPS unit located on my Polaris?
This varies by model. On most Sportsman ATVs, it’s located behind the front plastics, near the radiator. On RZR and Ranger models, it’s typically mounted to the firewall under the dash. A quick check of your owner’s manual will show you the exact location.
What if the code comes back after I’ve done all these checks?
If you have confirmed your battery is healthy, the charging system is working, and all connections and grounds are clean and tight, then it’s time to consider a more serious issue. The problem could be a faulty voltage regulator or, in rare cases, the EPS unit itself has failed. At this point, consulting a professional mechanic or the dealer for advanced diagnostics is your best next step.
Troubleshooting the polaris code 746 4 doesn’t have to be a nightmare. By starting with the basics—voltage, terminals, and grounds—you can solve this common issue yourself and get back to what matters most.
Grab your tools, stay methodical, and trust the process. You’ve got this. Now get out there and ride safe!
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