Diagnosing Electronic Power Steering Issues in 2018 Ram 1500 Models: Warning Signs, Common Failures, and Repair Solutions
You’re cruising through a gentle curve when suddenly the steering wheel fights back—it feels like the power assist just vanished, and for a terrifying second, you’re wrestling a 5,000-pound truck with nothing but arm strength.
If this has happened to you, or if you’ve noticed your steering feeling inconsistent, you’re not alone. The 2018 Ram 1500’s electronic power steering (EPS) system has become a growing concern among owners, with complaints ranging from intermittent assist failure to complete system shutdowns at highway speeds . Unlike the old hydraulic systems that gave you warning signs before failing, EPS problems can strike without notice—and when they do, safety becomes the immediate concern.
This guide walks you through exactly how to diagnose EPS issues in your 2018 Ram 1500. We’ll cover the warning lights you need to watch for, the common failure patterns owners are reporting, the diagnostic steps you can take yourself, and what the repair actually involves. Most importantly, we’ll help you understand whether your truck might be covered by outstanding recalls—and what to do if it’s not.
TL;DR
The 2018 Ram 1500’s electronic power steering system has documented failures ranging from intermittent assist loss to complete rack failure . The system uses an electric motor mounted to the steering rack rather than a hydraulic pump, eliminating fluid but introducing electronic failure points. Common symptoms include “tight then loose” steering feel, complete loss of assist (often with the red steering wheel warning light), and failure that strikes without warning . Diagnosis starts with checking for EPS-specific warning lights and scanning for trouble codes. While some 2013-2019 Rams had steering-related recalls, many 2018 owners report their VINs aren’t covered despite identical symptoms . Repair typically requires replacing the entire steering rack assembly, costing $2,500-$3,500 at dealerships, with parts sometimes on national backorder .
Key Takeaways
- No Fluid, No Pump: The 2018 Ram 1500 uses electric power steering—there’s no power steering fluid reservoir or pump to check. If you’re looking for a fill cap, you won’t find one .
- The Warning Light Is Critical: A red steering wheel icon with an exclamation point means the system has detected a fault. If it’s flashing, the vehicle needs immediate dealer service .
- Intermittent Failure Is Common: Many owners report steering that works fine one moment and fails the next, often without warning. This pattern suggests an electronic rather than mechanical issue .
- Safety Risk Is Real: Loss of power assist at highway speeds or in curves has caused near-miss accidents. Multiple complaints describe “extremely dangerous” situations requiring both hands and full strength to maintain control .
- Recall Confusion Exists: While NHTSA recalls cover some steering-related issues, many 2018 owners report their trucks exhibit the same symptoms as recalled vehicles but aren’t included .
- Parts Availability Is Problematic: Replacement steering racks have been on national backorder, leaving owners waiting weeks or months for repairs .
- Safety Reminder: If your power steering fails while driving, stay calm, grip the wheel firmly with both hands, and gradually slow down. The manual states you can still steer—it just requires significantly more effort .
Understanding Your 2018 Ram 1500’s EPS System
Before diving into diagnosis, you need to understand what’s actually under your hood—or rather, what’s not there.
Electric vs. Hydraulic: A Complete Departure
The 2018 Ram 1500 uses an Electric Power Steering (EPS) system. This is fundamentally different from the hydraulic systems found on older trucks and on the heavy-duty Ram 2500/3500 models .
In a hydraulic system, a belt-driven pump pressurizes fluid to assist your steering. You check the fluid level, look for leaks, and listen for pump whine. None of that applies to your 2018 1500.
One forum member learned this the hard way, asking where to add power steering fluid—only to be told: “Dude, you do not have fluid, or a pump. It is electric” .
How EPS Works
The EPS system consists of:
- An electric motor mounted directly to the steering rack
- A torque sensor that measures how hard you’re turning the wheel
- An electronic control module (often integrated into the rack) that determines how much assist to provide
- The steering rack itself (the mechanical part that moves the wheels)
When you turn the wheel, the sensor detects the motion and tells the motor to provide assist. The amount of assist varies with vehicle speed—more at parking speeds, less on the highway for stable feel.
The entire system is monitored by the truck’s computers. When something goes wrong, it sets a Diagnostic Trouble Code (DTC) and typically illuminates a warning light .
Diagnostic Access and the Security Gateway Module
Here’s an important technical detail for anyone planning to diagnose EPS issues themselves: the 2018 Ram 1500 (and newer models) includes a Security Gateway Module (SGW) . This module acts as a firewall between your truck’s critical computers and the outside world.
What this means for you: Standard OBD2 scanners may not be able to communicate with the EPS module or read its trouble codes. To perform active diagnostics or coding, you need either:
- A professional-level scan tool with SGW bypass capabilities
- An SGW bypass cable that allows access to the secure CAN-C and CAN-IHS networks
This is why many owners end up at the dealer for proper diagnosis—consumer-grade scanners often can’t see what’s happening inside the EPS system.
Recognizing EPS Failure: Symptoms and Warning Signs
The 2018 Ram 1500 has accumulated dozens of steering-related complaints, many describing frightening and dangerous failures . Here’s what owners are actually experiencing.
The “Tight Then Loose” Phenomenon
One owner described it perfectly: “My steering is tight then loose both while driving or parked” . This intermittent behavior is a hallmark of EPS issues. The assist may cut in and out randomly, making the truck unpredictable to drive.
Several possibilities exist:
- A failing torque sensor sending erratic signals
- Intermittent electrical connection (ground issues, loose connectors)
- Internal rack failure causing inconsistent assist
Complete Loss of Assist (The Red Steering Wheel)
The most serious and common complaint is sudden, total loss of power steering assist. Multiple NHTSA complaints describe this happening without warning :
- “While driving the power steering stopped working causing the vehicle to become very difficult to steer. Fortunately this happened while traveling in a straight line”
- “I was driving in a curve when the power steering went out and it took everything I had to keep from have a serious accident”
- “The power stearing keep going in and out from 10 mph to 50 all speeds”
When this happens, the red steering wheel warning light typically illuminates on the dash, sometimes with a “Service Power Steering” or “POWER STEERING SYSTEM OVER TEMP” message .
What the Owner’s Manual Tells You
According to the 2018 Ram 1500 owner’s manual, there are two distinct warning scenarios :
| Warning Display | What It Means | What To Do |
|---|---|---|
| Red steering wheel icon FLASHING | System fault detected; likely loss of power steering assistance | Take to dealer immediately. Vehicle may have lost assist |
| “POWER STEERING SYSTEM OVER TEMP” message | Extreme steering maneuvers caused overheating | Pull over safely, let engine idle until message clears |
| “SERVICE POWER STEERING – ASSIST OFF” message | System requires service | Take to dealer. Vehicle may still be drivable but with increased effort |
Critical note from the manual: “Even if the power steering assistance is no longer operational, it is still possible to steer the vehicle. Under these conditions there will be a substantial increase in steering effort, especially at low speeds and during parking maneuvers” .
Other Electrical Chaos: Related or Separate?
Some owners report EPS failure alongside other electrical gremlins, suggesting a broader electrical system issue rather than isolated steering failure :
“My 2018 Ram1500 with the V6 Pentastar engine – entire electrical system was shutting on and off almost a blinking effect causing the antilock break warning to come on problems with power steering dash shutting off and on reducing engine power and almost shutting the engine off”
If your EPS problems occur alongside ABS lights, traction control warnings, or other electrical chaos, the root cause may be:
- A failing battery or alternator (low voltage wreaks havoc on EPS)
- Bad ground connections
- A failing Totally Integrated Power Module (TIPM) or other central electrical component
Always check your battery health and charging system before condemning the steering rack.
The Mechanical U-Joint Possibility
Not every steering issue is electronic. One owner was advised to check the “U-joint in steering shaft may be binding, good lubricant might help” . A binding steering shaft can create tight spots that feel like assist failure but are actually mechanical binding.
How to test: With the truck parked and engine running, turn the wheel lock-to-lock slowly. Feel for spots where it gets harder or makes noise. If the resistance is consistent but just heavy, it’s likely electronic. If it hits a tight spot that then releases, suspect the U-joint.
Diagnosis: Steps You Can Take
While full diagnosis often requires dealer-level tools, here’s what you can do yourself.
Step 1: Check for Warning Lights
Start the truck and watch the instrument cluster. Does the red steering wheel light come on and stay on? Does it flash? Note exactly what you see. If the light is on, the system has detected a fault and stored a code .
Step 2: Check Battery and Charging System
EPS systems are voltage-sensitive. Low voltage can cause erratic operation or complete shutdown. Have your battery and alternator tested at any auto parts store for free. Look for:
- Battery voltage at rest: 12.4-12.6 volts
- Engine running voltage: 13.8-14.4 volts
- Clean, tight battery connections
Step 3: Check Ground Connections
Locate the main ground straps from the engine to the chassis and from the battery negative to the body. Ensure they’re clean, tight, and not corroded. Bad grounds can cause intermittent electrical failures across multiple systems.
Step 4: Visual Inspection of the Rack
Look at the steering rack itself (mounted behind the engine, connected to the front wheels). Check for:
- Obvious physical damage
- Loose electrical connectors
- Signs of impact or corrosion
- The condition of the rubber boots (split boots let contamination destroy the rack)
Step 5: Scan for Codes (If You Have the Tools)
If you have access to a professional-level scanner that can communicate past the Security Gateway Module, scan for EPS-related codes. If you only have a basic OBD2 scanner, you likely won’t see EPS-specific codes—the SGW blocks access .
Step 6: Check for Recalls
This is critical. Run your VIN on the NHTSA website or Mopar’s recall site. Look for any open recalls related to steering. Note that many owners report their VINs aren’t covered despite having symptoms identical to recalled trucks .
One complaint stated: “There is a recall covering ram 1500 trucks from 2013 – 2019 for this exact problem definition, but multiple ram dealerships that i have contacted state my vehicle does not fall under the recall (per vin)” .
Diagnosis Comparison Chart
| Symptom Pattern | Likely Cause | Diagnostic Approach |
|---|---|---|
| Intermittent loss of assist, no warning lights | Loose connection, failing sensor, voltage issue | Check battery/grounds, professional scan |
| Sudden complete failure, red light on | Failed EPS rack/module | Dealer diagnosis, prepare for rack replacement |
| Stiff steering with no warning light | Mechanical binding (U-joint) | Inspect steering shaft, lubricate |
| EPS failure + ABS/traction control issues | Electrical system problem | Check battery, alternator, grounds thoroughly |
| Overheating message after maneuvering | Normal protection mode | Let system cool; if frequent, diagnose |
The Recall Situation: What’s Covered and What’s Not
This is the most frustrating aspect of 2018 Ram 1500 EPS issues. Let’s break down what we know.
Existing Recalls
There have been steering-related recalls on Ram trucks, including:
- Certain 2013-2019 models for steering issues
- Specific recalls for drag link defects and electrical grounds
However, multiple owners report that despite having symptoms matching recalled trucks, their 2018 models aren’t covered .
One owner’s frustration is palpable: “The NHTSA needs to investigate this complaint and hold ram accountable to fix the known issue on all ram trucks. It is not a matter of if, but a matter of when. Loss of power steering can lead to a serious accident” .
How to Check Your VIN
- Go to the NHTSA recall website (nhtsa.gov/recalls)
- Enter your 17-digit VIN
- Review any open recalls
If your VIN shows no open recalls but you’re experiencing symptoms, document everything and file a complaint with NHTSA. More complaints increase pressure for expanded recall coverage.
Repair Options and Costs
If you’ve confirmed an EPS failure, here’s what you’re looking at.
The Part: Steering Rack Assembly
The EPS system is integrated into the steering rack. You cannot simply replace a motor or sensor—the entire rack assembly must be replaced. This is a major component.
Part numbers vary by configuration (2WD vs. 4WD, etc.). Your dealer can identify the correct part for your VIN.
The Cost
Based on owner reports :
- Parts alone: $1,500–$2,500 (new OEM rack)
- Labor: 3–5 hours at dealership rates ($500–$1,000)
- Alignment: Required after rack replacement ($100–$150)
- Total dealer repair: $2,500–$3,500
One owner reported: “This part will cost over $3,000 to replace, that’s over $6,000 dollars for this truck in less that 80,000 miles” (referring to two failures) .
Parts Availability Nightmare
Multiple owners report the steering rack is on national backorder . This means even if you’re willing to pay, you may wait weeks or months for the part.
One complaint: “The steering rack is unserviceable and on national backorder” .
Aftermarket Options
As of early 2026, aftermarket EPS racks for the 2018 Ram 1500 are limited. This is a complex electronic component, and most aftermarket suppliers haven’t entered this space. Your options are essentially:
- New OEM from dealer (expensive, possible backorder)
- Used OEM from salvage yard (risky, unknown history)
- Remanufactured units (limited availability)
Used Rack Caution
If you find a used rack, understand that EPS racks are typically VIN-specific and may require programming to work in your truck. A used rack from a salvage yard may not be plug-and-play—it may need dealer-level programming to communicate with your truck’s systems.
What To Do If Your EPS Fails While Driving
This is the most important section. If you lose power steering while moving:
- Stay calm. Panic makes everything worse.
- Grip the wheel firmly with both hands. It will take significant effort to turn.
- Do not slam on the brakes. Sudden braking with reduced steering control can cause loss of control.
- Gradually slow down by lifting off the accelerator.
- Turn on your hazard lights to warn other drivers.
- Steer to a safe location using both arms. At higher speeds, the effort is less than at parking speeds, but it’s still substantial.
- Once stopped, turn the truck off and back on. Sometimes a reboot restores function temporarily .
Remember the manual’s words: you CAN still steer. It’s just physically demanding.
Frequently Asked Questions
Does my 2018 Ram 1500 have power steering fluid?
No. The 2018 Ram 1500 uses electric power steering. There is no fluid reservoir, no pump, and no fluid to check or change .
Why does my steering feel tight then loose?
This intermittent symptom often indicates an electronic issue—failing sensor, loose connection, or intermittent power loss. It could also be a binding steering shaft U-joint .
What does the red steering wheel light mean?
A red steering wheel icon with an exclamation point indicates a fault in the electric power steering system. If it’s flashing, the vehicle needs immediate service—power assist may be lost .
Can I drive with the power steering light on?
You can, but you shouldn’t ignore it. The manual states that even with assist off, you can still steer—but it requires much more effort. If the light is on, have the system diagnosed promptly .
Is there a recall for 2018 Ram 1500 power steering?
Some 2018 models may be covered by specific recalls, but many owners report their VINs aren’t included despite having symptoms. Check your VIN on the NHTSA website to be sure .
How much does it cost to fix EPS on a 2018 Ram 1500?
Dealer replacement of the steering rack typically runs $2,500–$3,500, depending on labor rates and parts availability .
Why can’t my scanner read EPS codes?
The 2018 Ram 1500 has a Security Gateway Module that blocks access to critical systems. You need a professional scanner with SGW bypass capability or a dealer-level tool .
Will a new battery fix my EPS problems?
If your issues are caused by low voltage, yes—a failing battery can cause all sorts of electrical gremlins. Always check battery health before condemning the steering rack.
My EPS failed in the rain—is that related?
Possibly. One owner reported EPS failure after driving through standing water . Water intrusion into connectors or the rack itself can cause failures. If this happened to you, mention it to your technician.
What’s the difference between 1500 and 2500 steering?
Ram 2500/3500 models still use hydraulic power steering with a pump and fluid. The 1500 is the one with electric steering .
The Bottom Line
The electronic power steering system in your 2018 Ram 1500 represents modern automotive technology—lighter, more efficient, and packed with sensors. But when it fails, it fails hard, and it fails expensively.
Here’s the thing about EPS failures—they’re not like a slow fluid leak where you have weeks of warning. They can strike without notice, turning a routine drive into a white-knuckle experience.
If you’re experiencing steering issues, don’t wait. Check your battery, check your grounds, check for recalls, and get a professional diagnosis. If you’re not covered by a recall and facing a $3,000 repair, file a complaint with NHTSA. The more owners who report, the harder it becomes for manufacturers to ignore the pattern.
And if you’re driving a 2018 Ram 1500 with no steering issues yet? Consider yourself lucky—but stay aware. That red steering wheel light means business.
Have you experienced EPS failure in your 2018 Ram 1500? Were you covered by a recall, or did you have to pay out of pocket? Share your story in the comments—your experience could help another owner recognize the signs before it’s too late.
References:
- RamForumZ: 2018 Ram 1500 Steering Tight/Loose Discussion
- Appcar DiagFCA: Ram 1500 Diagnostic Information (2019-2022)
- Car Complaints: 2018 Ram 1500 Electrical System Complaints
- RamForumZ: Electrical Problems 2018 Ram 1500 V6 Pentastar
- 2018 Ram 1500 Owner’s Manual: Power Steering Warning Lights
- Vehie: 2018 Ram 1500 Steering Failure Complaint
- Car Complaints: 2018 Ram 1500 Steering Problems (Page 2)
- 2018 Ram 1500 Owner’s Manual (French): Power Steering Messages
