C1592 on 2022-2025 Jeep Wagoneer: Electric Power Steering Fixes

What's Unique About the 2022-2025 Jeep WAGONEER

The 2022-2025 Wagoneer and Grand Wagoneer (WS platform) are highly prone to this specific steering issue, as evidenced by numerous Technical Service Bulletins (TSBs) issued by the manufacturer. Unlike many vehicles where a circuit code often points to a wiring or hardware failure, on the Wagoneer, the primary cause is frequently a software logic error within the EPS control module. This module can misinterpret sensor data and shut down steering assist as a false safety measure, making a software update the first and most critical diagnostic step. 🎬 Watch: What to do when your steering suddenly feels heavy. This issue is so prevalent that it has prompted a class-action lawsuit investigation for 2022-2023 models.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle. 👇

Symptoms You May Notice

• Complete loss of power steering assist, making the steering wheel very hard to turn.
• "Service Power Steering" warning light illuminated on the dashboard.
• Malfunction Indicator Lamp (MIL) illumination.
• Loss of steering assist intermittently, especially at vehicle start-up.
• A low-frequency EPS motor noise during low-speed steering maneuvers, which may be more noticeable at higher temperatures.

Most Likely Causes

1. Power Steering Control Module (PSCM) Software Issue 🔴 High Probability → Shop Power Steering Control Module Multiple TSBs (e.g., 08-146-23, 08-095-25 REV. A) confirm that the original EPS software is overly sensitive and can cause a shutdown. TSB 08-146-23 explicitly states the cause is 'EPS Software' and was released as a Rapid Service Update (RSU 23-176) due to its prevalence.
   How to confirm: A Jeep dealership or a qualified shop with a wiTECH scan tool must check the current software version of the EPS module against the latest available updates referenced in the TSBs.
   Typical fix: Reprogramming (flashing) the EPS module with the latest manufacturer software. This is a dealer-only or specialist repair that takes approximately 0.3 labor hours.
   Est. part cost: $0
2. Failed Electric Power Steering (EPS) Rack Assembly 🟡 Medium Probability → Shop Steering Gear The code often appears alongside internal module failure codes like C2217-00, suggesting the entire integrated rack/motor/module unit has failed. If a software flash doesn't work, the entire assembly is the next logical replacement as components are not serviced individually.
   How to confirm: If a software update does not resolve the issue and all wiring is confirmed to be intact, the failure is internal to the rack assembly. A technician may perform advanced circuit tests, but it's typically a process of elimination after the software fix fails.
   Typical fix: Complete replacement of the electric power steering rack and pinion assembly, followed by software programming and calibration.
   Est. part cost: $1500-$2500
3. Wiring or Connector Fault ⚪ Low Probability While less common than software issues on this platform, wiring harnesses can still be susceptible to damage from road debris, abrasion, or corrosion at the connectors. However, TSBs point away from this as a primary cause.
   How to confirm: Visually inspect the wiring harness and connectors going to the electric power steering rack for any signs of damage, looseness, or corrosion. Perform continuity and voltage drop tests on the motor circuit.
   Typical fix: Repairing the damaged section of the wiring harness or cleaning/replacing the affected electrical connector.
   Est. part cost: $20-$200

Rare But Worth Checking

• Failing Battery or Charging System: → Shop Vehicle Battery The EPS system requires significant, stable electrical power. Some owners have reported that seemingly unrelated electrical issues, stemming from a weak battery or alternator, can trigger power steering faults. Before expensive repairs, it's wise to have the battery and charging system professionally tested. A TSB for the related Jeep Cherokee (KL) warns that battery voltage must be maintained between 13.2 and 13.5 volts during a reflash to avoid bricking the module.

Diagnosis Steps

1. Connect a dealership-level scan tool (like wiTECH) to the vehicle and check for all stored DTCs in the PSCM and other modules.
2. Specifically check for C1592 and any accompanying codes like C2217, C221F, or C1593.
3. Crucial First Step: Check for available Technical Service Bulletins (TSBs) and software updates for the Electric Power Steering (EPS) Module. TSBs like 08-146-23 (also released as RSU 23-176) directly address this code with a software flash.
4. If a software update is available, perform the flash procedure. This requires a stable power supply (battery maintainer) and following the manufacturer's instructions precisely to avoid damaging the module. The supplier has noted the ECU may not recover if the flash is interrupted.
5. After the flash, wait two minutes, then perform the required 'EPS reset' procedure using the wiTECH 'Guided Diagnostics' menu. Failure to do this may cause other warnings like 'Service Active Lane Management'.
6. Clear all DTCs that may have been set during reprogramming.
7. If no software update is available or the issue persists after the update, perform a thorough visual inspection of the wiring harness and connectors to the EPS rack. Look for chafing, corrosion, or loose pins.
8. If wiring appears intact, perform circuit integrity tests (checking for power, ground, and signal) on the EPS motor circuit according to the factory service manual.
9. If the software is up-to-date and the wiring/connectors are confirmed to be good, the fault is internal to the EPS rack assembly, which must be replaced.

Parts You'll Likely Need

• Electric Power Steering Rack and Pinion Assembly (OEM #68593046AE) — This is the required part if a software update and wiring check do not resolve the issue. The motor and control module are integrated into the rack and not serviced separately.
  Trusted brands: Mopar (OEM)
  OEM price range: $1800-$2800
  Aftermarket price range: $1200-$1800

Related Codes That Often Appear With This One

• C2217-00 — This code for 'Electric Power Steering Module Internal' often accompanies C1592, indicating the problem may be a comprehensive failure within the EPS unit, often solvable by a software flash or unit replacement.
• C221F-00 — This code, 'ECU Not Initialized,' points to a configuration or software problem within the steering module, reinforcing the likelihood of a software-based issue.
• C1593-00 — A 'Steering Torque Sensor Circuit' fault, this code often appears in the same group of TSBs, suggesting a systemic software issue affecting multiple sensor inputs within the EPS module.

Technical Service Bulletins (TSBs) & Recalls

• TSB 08-146-23 / RSU 23-176 (June 16, 2023): Supersedes a previous TSB and provides a software update to fix C1592-00, C1593-00, and C2217-00 causing loss of steering assist. Explicitly states the cause is 'EPS Software'.
• TSB 08-095-25 REV. A (April 30, 2025): Lists C1592-00 along with other EPS codes as a reason for loss of steering.
• TSB 08-227-24 (November 1, 2024): For 2024 models, this TSB involves updating the EPS module software to fix C1592-00 and related codes.
• TSB 08-202-22 REV. B (December 16, 2022): An earlier bulletin, now superseded by 08-146-23, which also addressed C1592-00 with a software update.
• TSB 08-005-23 (January 6, 2023): A related TSB for the 2022 Jeep Grand Cherokee (WL) addressing the same codes (C1592, C2217, C1593) and symptoms with a software flash, showing the problem exists across similar platforms.

Platform-Specific Known Issues

• A widespread software issue is the primary cause of this code on the 2022-2025 Wagoneer platform, addressed by multiple TSBs.
• Owners have reported sudden and terrifying loss of power steering while driving, reinforcing the critical nature of this fault.
• A class-action lawsuit investigation was initiated by Chimicles Schwartz Kriner & Donaldson-Smith LLP for 2022-2023 models concerning sporadic electrical system failures leading to the loss of power steering and brakes.
• In one documented lemon law case, a 2023 Jeep Wagoneer was bought back by FCA after spending 50 days in the shop for issues including power steering failure that required an ECU flash.

Mechanic-Grade Diagnostic Values

• Battery Voltage During EPS Module Flash — expected: Must be maintained between 13.2 and 13.5 volts. Failure: Voltage dropping below 13.2V or exceeding 13.5V can cause the flash to fail and potentially render the EPS module inoperable.
• Charging System Voltage (Engine Running) — expected: 13.5 - 14.5 volts at the battery terminals. Failure: A reading significantly lower than 13.5V indicates a potential alternator or charging system issue that can trigger EPS faults.
• Static Battery Voltage (Engine Off) — expected: ~12.6 volts for a fully charged battery. Failure: Significantly lower voltage indicates a weak or discharged battery that should be tested or replaced before diagnosing the EPS system.
• Parasitic Drain — expected: Less than 50 milliamps (0.05A). Failure: A reading higher than 50mA with the vehicle off for at least 30 minutes indicates a module or component is not sleeping properly, which can drain the battery and cause various electrical faults.

Scan Tool Commands That Help

• wiTECH: Reprogram the EPS module — This is the primary repair for DTC C1592 as specified by multiple TSBs. It updates the module's software to correct logic errors.
• wiTECH: EPS Reset — This is a mandatory procedure immediately after reprogramming the EPS module. Failure to perform this reset can cause other warnings, such as for the Active Lane Management system. The path is: Guided Diagnostics -> Reset ECU -> EPS.
• wiTECH: Proxy Alignment (Proxy Configuration Alignment) — Required after reprogramming the EPS module to ensure all vehicle modules recognize the updated component. Failure to perform this can set DTC C221F-00 (ECU Not Initialized). The path is typically under the BCM 'Miscellaneous Functions' tab or 'Guided Diagnostics' tab.
• wiTECH: Steering Angle Calibration — This may be required after an EPS module flash or replacement to calibrate the steering angle sensor. The path is: EPS Module > Misc Functions Tab > Steering Angle Calibration.

Real Owner Repair Stories

• Reddit user comment (Jeep (model not specified, but in a thread about a 2022 Wagoneer)) — Service Power Steering light and difficult steering.
  ✅ What actually fixed it The user found the negative battery cable ground on the transmission was cracking or broken off. Replacing/repairing this ground connection resolved the issue.
• CarComplaints.com owner report (2022 Jeep Wagoneer) — Random loss of braking ability and power steering.
  ❌ Tried (didn't work) Replacing the battery. The issue reoccurred 12 days later.
  ✅ What actually fixed it The story is a report of a failed fix, highlighting that simply replacing the battery may not be the solution even if it temporarily resolves the problem.
• CarComplaints.com owner report (2022 Jeep Wagoneer) — While driving on the highway, all power cut out, power steering stopped working, and brakes failed.
  ✅ What actually fixed it The vehicle was towed to a dealership, where they determined the alternator and battery had died. Replacing these components resolved the immediate failure.

OEM Part Supersession History

• 68565874AD → 68593046AE — Part revision or update by the manufacturer.
  Heads up: These part numbers are confirmed to fit Short Wheelbase (SWB) models only. They will NOT fit the Wagoneer L or Grand Wagoneer L (LWB) models.

Model Year Variations Within This Range

• 2022-2025: The steering rack assembly is different between Short Wheelbase (SWB) models and Long Wheelbase (LWB) models (Wagoneer L, Grand Wagoneer L). The common replacement part numbers (like 68593046AE) are for SWB models only and will not fit LWB vehicles.