2021-2026 Jeep Wrangler/Gladiator Ice Blockage DTCs P2072

Introduction

Jeep has issued STAR Online Publication S2218000003 Rev B, released in September 2025, to address customer complaints regarding various engine and driveability issues. This technical service bulletin (TSB) specifically targets problems that manifest as a "Mil On/Check Engine Lamp On" or an "Electronic Throttle Control (ETC) Lamp On", often accompanied by noticeable changes in vehicle performance. The core issue identified is ice build-up within the throttle body, particularly prevalent in very cold ambient temperatures.

Symptoms

Owners of 2021-2026 Jeep Wrangler and Gladiator vehicles may experience a range of symptoms related to this condition. The most common indicators include the illumination of the "Mil On/Check Engine Lamp On" or the "Electronic Throttle Control (ETC) Lamp On" on the dashboard. Beyond these warning lights, drivers might also notice various driveability issues, such as rough idling, hesitation during acceleration, or reduced engine power. These symptoms are primarily observed when the vehicle is operated in very cold ambient temperatures, suggesting a direct link to environmental conditions.

Fault Codes / DTCs

Upon further investigation by a technician, the Powertrain Control Module (PCM) may store specific Diagnostic Trouble Codes (DTCs) related to the throttle control system. These codes help pinpoint the nature of the problem:

Code	Description
P2072	Electronic Throttle Control System - Ice Blockage
P2110	Electronic Throttle Control System Bank 1 - Forced Limited RPM
P2118	Electronic Throttle Control Motor Current Performance - Bank 1

These DTCs indicate issues ranging from direct ice blockage within the electronic throttle control system to performance limitations and current anomalies in the throttle motor.

Diagnosis and Trigger Conditions

Technicians are advised that before proceeding with general diagnostics for the listed fault codes, they must first check for ice build-up in the throttle body. This condition, which leads to the Jeep Wrangler ice blockage, is known to occur specifically in very cold ambient temperatures. If ice is found, the vehicle should be warmed indoors to facilitate the repair process. This initial check is crucial for correctly identifying the root cause of the symptoms and associated DTCs.

Repair Procedure Summary

The recommended repair process for addressing the Jeep Wrangler ice blockage and related symptoms involves several key steps. First, if ice build-up is present, the vehicle must be warmed indoors to allow the ice to melt. Next, technicians need to thoroughly clean all traces of oil and water from the clean air duct located ahead of the throttle body. This cleaning extends to both ends of the PCV (Positive Crankcase Ventilation) hose and both ends of the MUA (make-up-air for the PCV) hose. Finally, the engine oil should be changed to eliminate any water that may have collected in the oil sump. This comprehensive cleaning and oil change procedure is the only recommended repair at this time, as the issue remains under engineering investigation.

Important Warnings

Owners and technicians should be aware of specific advisories related to this communication. This document, S2218000003 Rev B, does not authorize warranty repairs. Furthermore, it's important to note that this issue is currently under engineering investigation, meaning the manufacturer is still working to understand and potentially develop a more permanent solution. The information provided captures past experiences and does not offer definitive conclusions about the vehicle's underlying problem.

Owner Action

If you own a 2021-2026 Jeep Wrangler or Gladiator and are experiencing a "Check Engine Lamp On" or "ETC Lamp On" along with driveability issues, especially in cold weather, it is recommended to visit your authorized Jeep dealer. Inform them of the symptoms and mention STAR Online Publication S2218000003 Rev B. While this document does not authorize warranty repairs, the described procedure is the current recommended fix for the Jeep Wrangler ice blockage.

Source Citation

NHTSA ID: 11023331