# 2018 Jeep Grand Cherokee Power Steering Not Working > ClearTheCode — Experiencing 2018 Jeep Grand Cherokee power steering not working? Discover common causes, diagnostic steps, and repair options to fix stiff steering and restore driving safety. Source: https://clearthecode.com/articles/power-steering-assist-failure-jeep-grand-cherokee-2018 Author: ClearTheCode # 2018 Jeep Grand Cherokee power steering not working Imagine you're driving your 2018 Jeep Grand Cherokee, perhaps pulling into a parking spot or navigating a tight turn, and suddenly the steering wheel becomes incredibly heavy, almost impossible to turn. This abrupt loss of power steering assist is a concerning and potentially dangerous issue that many Grand Cherokee owners might encounter. Unlike traditional hydraulic systems that might show gradual symptoms like whining noises or fluid leaks, the electronic power steering (EPS) system in your Jeep can fail without much warning, leaving you to muscle the wheel with significant effort. When your **2018 Jeep Grand Cherokee power steering not working** becomes a reality, understanding the underlying causes and potential solutions is crucial for restoring your vehicle's safety and drivability. ## What drivers notice on this 2018 Jeep Grand Cherokee The most immediate and alarming symptom is the sudden and complete loss of steering assist. This means that the power steering motor, which normally makes turning the wheels effortless, has stopped functioning. Drivers will notice: * An extremely heavy steering wheel, especially at low speeds or when parking. The effort required can be comparable to driving a vehicle from the era before power steering was standard. * A significant increase in effort required to turn the wheel, making driving fatiguing and unsafe, particularly on winding roads or during emergency evasive actions. * The steering wheel may feel "dead" or unresponsive, lacking the usual feedback and smoothness. * A warning light, often a steering wheel icon or a general "service power steering" message, may illuminate on the dashboard. This is a critical indicator that the EPS system has detected a fault. * In some cases, the issue might be intermittent, with power steering cutting out and then returning, which can be even more startling and dangerous. * Noises like grinding or whining are less common with EPS failure compared to hydraulic systems, but unusual electrical sounds might precede a complete failure. ## At a glance: difficulty, repair cost, and diagnostic workflow - **Difficulty Rating:** 8/10 — Moderate to advanced - **Common Symptoms:** 2018 Jeep Grand Cherokee Power Steering Not Working - **Estimated Repair Cost:** $200–$1,800 (parts + typical shop labor) - **OEM Tooling Required:** Standard OBD-II scanner and hand tools **Diagnostic workflow:** 1. Confirm the symptom on your vehicle. 2. Scan for stored or pending codes with an OBD-II tool. 3. Inspect the most common causes in this guide (visual checks first). 4. Run verification tests before replacing parts. 5. Repair, clear codes, and verify on a test drive. ## Common Causes of 2018 Jeep Grand Cherokee Power Steering Failure The electronic nature of the 2018 Grand Cherokee's power steering system means that failures are typically electrical or electronic, rather than mechanical or hydraulic. Several components can lead to your **2018 Jeep Grand Cherokee power steering not working**: * **Electronic Power Steering (EPS) Control Module Failure:** This is a frequent culprit. The module is the brain of the system, interpreting steering wheel input and controlling the assist motor. Internal electronic faults, software glitches, or even water intrusion can cause it to fail. * **EPS Motor Malfunction:** The electric motor directly provides the steering assist. If the motor itself fails due to wear, internal shorts, or mechanical binding, power steering will be lost. * **Wiring Harness or Connector Issues:** Damaged, corroded, or loose wiring and connectors between the EPS module, motor, and vehicle's main electrical system can interrupt communication or power supply, leading to system failure. * **Steering Position Sensor Failure:** The EPS system relies on sensors to determine the steering wheel's position and the driver's input. A faulty sensor can send incorrect signals, causing the module to cease assist or provide erratic steering. * **Battery or Alternator Issues:** While less direct, an unstable or insufficient power supply from a failing battery or alternator can sometimes cause the EPS system to malfunction or shut down, as it requires a consistent voltage. * **Software Glitches or Corrupted Firmware:** Like any complex electronic system, the EPS module can experience software bugs or corrupted firmware, necessitating a reflash or update. ### Related guides on this vehicle - [2017 Jeep Grand Cherokee Transmission Shifting Hard: Fixes and Solutions](/articles/shifter-transmission-problems-jeep-grand-cherokee-2017) - [AC Not Cold Enough 2018 Toyota Rav4: Fix Warm Air](/articles/ac-not-cold-enough-warm-air-toyota-rav4-2018) - [Driver Side Power Window Won't Go Up 2018 Toyota Land Cruiser](/articles/power-window-wont-go-up-driver-side-toyota-land-cruiser-2018) ## Verification and Diagnosis When your **2018 Jeep Grand Cherokee power steering not working** becomes apparent, proper diagnosis is key. Do not overlook these steps: 1. **Initial Driver Checks:** * **Check Dashboard Warning Lights:** Look for a power steering warning light (often a steering wheel icon) or a general "SERVICE POWER STEERING" message. These confirm a system fault. * **Listen for Unusual Noises:** While rare for EPS, any new grinding or electrical buzzing sounds should be noted. * **Inspect Battery Terminals:** Ensure battery terminals are clean and tight. A poor connection can cause voltage drops that affect sensitive electronic systems. 2. **Scan Tool Use:** * **OBD-II Scan Tool:** A basic OBD-II scanner might reveal generic powertrain codes, but for EPS-specific issues, a more advanced diagnostic scan tool is crucial. This tool needs to be capable of communicating with the EPS control module (C-CAN or D-CAN bus). * **Module Communication:** Check if the scan tool can establish communication with the EPS module. If not, the module itself or its power/ground supply might be at fault. * **Read Diagnostic Trouble Codes (DTCs):** Look for manufacturer-specific codes related to the power steering system. Common codes might include those related to the EPS motor circuit, module internal failure, or sensor faults. While we won't detail specific codes here, a qualified technician will interpret these to pinpoint the exact component or circuit at fault. You can learn more about [OBD-II codes](/codes) on our dedicated page. * **Live Data Analysis:** Monitor parameters like steering angle sensor readings, motor current draw, and module voltage supply to identify anomalies. 3. **Known TSB Patterns (Technical Service Bulletins):** * **Research TSBs:** Check with a Jeep dealership or reliable automotive service information database for any Technical Service Bulletins (TSBs) related to power steering issues on the 2018 Grand Cherokee. Manufacturers often issue TSBs to address known design flaws, software bugs, or common failures that affect a specific model year. These can provide valuable guidance for diagnosis and repair. * **Software Updates:** Some TSBs might indicate that a simple software reflash of the EPS module can resolve intermittent issues or improve system reliability. ## Repair Options and Solutions Addressing a **2018 Jeep Grand Cherokee power steering not working** issue typically involves replacing the faulty component, followed by calibration: * **EPS Control Module Replacement:** If the module is determined to be faulty, it will need to be replaced. This often requires programming the new module to the vehicle's specific VIN and configuration using specialized diagnostic equipment. * **EPS Motor Replacement:** If the electric motor is the issue, it may be replaced separately or as part of the entire steering rack assembly, depending on the design. Again, calibration and sometimes programming are necessary after replacement. * **Wiring Harness Repair/Replacement:** Damaged wiring or corroded connectors must be repaired or replaced to ensure proper electrical continuity and communication within the system. * **Sensor Replacement:** Faulty steering angle sensors or torque sensors may need to be replaced. These components are critical for the EPS system to function correctly. * **Software Update/Reflash:** In cases where the hardware is sound but a software glitch is present, a dealership or a shop with appropriate tools can perform a software update to the EPS module. It's important to note that EPS system repairs often require precise calibration to ensure proper steering feel and safety. This is not a DIY job for most owners and should be performed by a qualified professional. ## Estimated Repair Costs The cost to fix a **2018 Jeep Grand Cherokee power steering not working** issue can vary significantly based on the specific component that has failed, labor rates in your area, and whether genuine OEM parts are used. Here's a general breakdown: * **Diagnostic Fee:** Expect to pay an initial diagnostic fee, typically ranging from $100 to $200, to accurately pinpoint the problem. * **EPS Control Module Replacement:** This can be a costly repair. Parts alone might range from $500 to $1500+, with labor adding another $200 to $600 for removal, installation, and programming. * **EPS Motor Replacement (often part of steering rack):** If the motor is integrated into the steering rack, the entire rack assembly might need replacement. Parts could be $1000 to $2500+, plus labor of $400 to $800 or more. * **Wiring/Sensor Repair:** These are generally less expensive, potentially ranging from $200 to $700, depending on the complexity of the repair and component cost. * **Software Update:** A software reflash at a dealership might cost $150 to $300. Always obtain detailed quotes from reputable shops. For more repair guides, browse our [articles](/articles) to understand various automotive issues. ## Preventing Future Issues While sudden EPS failures can be hard to predict, some general practices can help maintain your vehicle's electrical health: * **Regular Battery Checks:** Ensure your battery is in good condition and maintains a stable voltage. Replace it if it shows signs of weakness. * **Inspect Wiring:** Periodically check visible wiring harnesses for signs of rodent damage, chafing, or corrosion, especially in areas exposed to the elements. * **Avoid Water Intrusion:** Be mindful of deep puddles or pressure washing engine bay components directly, as water can damage sensitive electronic modules. * **Promptly Address Warning Lights:** Never ignore a power steering warning light. Get your vehicle diagnosed as soon as possible. ## Frequently Asked Questions (FAQ) ### Can I drive my 2018 Jeep Grand Cherokee with no power steering? While it is technically possible to drive your 2018 Jeep Grand Cherokee without power steering assist, it is strongly advised against. The steering effort will be extremely heavy, making it very difficult to control the vehicle, especially at low speeds, during parking, or in emergency situations. This significantly compromises safety for both the driver and others on the road. It's best to have the vehicle towed for repair. ### How long does a power steering module last? The lifespan of an electronic power steering (EPS) module can vary greatly. Ideally, it should last the lifetime of the vehicle. However, factors like manufacturing defects, exposure to extreme temperatures, voltage fluctuations, or water intrusion can lead to premature failure. Some modules may fail within a few years, while others can last well over a decade. There isn't a fixed service interval for these components. ### What are the signs of a failing EPS motor? Signs of a failing EPS motor often include the sudden and complete loss of power steering assist, as described. Before complete failure, you might notice intermittent assist, a slight grinding or buzzing sound coming from the steering column or rack area (though less common than with hydraulic systems), or a feeling of resistance or notchy steering. A dashboard warning light for power steering is almost always present with a motor failure. For more information on your specific model, visit the [Grand Cherokee model hub](/vehicles/jeep/grand-cherokee). *** **Disclaimer:** *This article is for informational purposes only and is not a substitute for professional advice from a qualified technician. Always consult with a certified mechanic for diagnosis and repair of automotive issues. Driving a vehicle with compromised power steering can be dangerous. Explore other [vehicles](/vehicles) or learn more about [Jeep vehicles](/vehicles/jeep) on our site.