2022-2026 Jeep/RAM PCM Updates for MIL and DTCs

Stellantis has released Technical Service Bulletin (TSB) 18-044-26 to address various issues affecting 2022-2026 Jeep and RAM vehicles. This bulletin specifically targets vehicles equipped with the 3.0L I6 Hurricane HO Twin Turbo ESS engine (Sales Code EFC) and the 8-SPD Auto 8HP75 Transmission (Sales Code DFR). The primary goal of this TSB is to resolve instances where the Malfunction Indicator Lamp (MIL) illuminates and specific Diagnostic Trouble Codes (DTCs) are set.

This TSB, dated March 21, 2026, supersedes previous bulletins 18-081-24 REV. A (dated November 02, 2024), 18-084-24 (dated November 13, 2024), and 18-055-24 (dated June 15, 2024). Revisions include additional DTCs, customer symptoms, and updated market applicability, focusing on North America and the Middle East & Africa markets. Owners experiencing Jeep RAM MIL DTCs should consult their dealer.

Symptoms

Owners of affected vehicles may experience an illuminated Malfunction Indicator Lamp (MIL) along with one or more specific Diagnostic Trouble Codes (DTCs). Beyond the MIL, other noticeable symptoms can include:

• An "Oil Level High Warning in the Instrument Panel Cluster (IPC)" message.
• The Fully Autonomous Parking Assist (FAPA) system not deactivating when the accelerator pedal is pressed.
• The vehicle not heating up sufficiently in freezing temperatures.
• Poor A/C performance in hot ambient temperatures.
• An overly active engine speed display on the tachometer in the Instrument Panel Cluster (IPC), which is improved for smoother display.
• False fails with the MIL on are also addressed.

Fault Codes / DTCs

Customers experiencing Jeep RAM MIL DTCs will likely have one or more of the following codes stored in the vehicle's system, either in active or stored status:

Code	Description	Module
P0111-00	Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1	PCM
P0071-00	Ambient Air Temperature Sensor Performance	PCM
P0072-00	Ambient Air Temperature Sensor Circuit "A" Low	PCM
P0073-00	Ambient Air Temperature Sensor Circuit "A" High	PCM
P0011-00	Bank 1 Camshaft 1 Position Timing Over Advanced Or	PCM
P25E4-00	B Camshaft Position - Unable To Achieve Locked Position Bank 1	PCM
P05BD-00	Stop-Start Mode Switch Range/Performance	PCM
P0116-00	Engine Coolant Temperature Sensor 1 Performance	PCM
P062B-00	Internal Control Module Fuel Injector Control Performance	PCM
P0604-00	Internal Control Module Random Access Memory Ram Error	PCM
P060C-00	Internal Control Module Main Processor Performance	PCM
P018B-00	Fuel Pressure Sensor "B" Circuit Range/performance	PCM
P1CEA-00	Boost Side EVAP Purge System Performance	PCM
P06DD-00	Engine Oil Pressure Control Circuit Performance/Stuck Off	PCM
P00C6-00	Fuel Rail Pressure Too Low - Engine Cranking	PCM
P0300-00	Multiple Cylinder Misfire	PCM

Diagnosis

To diagnose these issues, technicians should use a Scan Tool (wiTECH) along with the appropriate Diagnostic Procedures found in DealerCONNECT/Service Library. All related systems must be verified for proper function. If any DTCs or symptoms are present other than those listed in TSB 18-044-26, they should be recorded and addressed separately before proceeding with the bulletin's repair procedure. If the customer's symptoms match those described, the repair procedure outlined in this bulletin should be followed.

Repair Procedure Summary

The repair involves reprogramming the Powertrain Control Module (PCM) with the latest available software. This is a software-only update designed to correct the underlying issues causing the Jeep RAM MIL DTCs and other performance concerns.

1. The technician will connect a wiTECH Diagnostic Application tool to the vehicle.
2. The PCM will be reprogrammed with the most current software version.
3. After the flash process is complete, all Diagnostic Trouble Codes (DTCs) that may have been set in any module due to the reprogramming will be cleared using the wiTECH application.

Required Tools or Parts

The primary tool required for this service is a wiTECH or equivalent scan tool, which is used for diagnostic checks and the PCM reprogramming process.

Important Warnings for Technicians

During the PCM reprogramming process, specific precautions must be taken to ensure a successful update and prevent damage:

• Battery Voltage: A battery charger must be installed to maintain battery voltage above 13.2 volts. It is crucial not to allow the charging voltage to exceed 13.5 volts during the flash process.
• Interruption: If the flash process is interrupted or aborted for any reason, it must be restarted from the beginning.

Owner Action

If your 2022-2026 Jeep or RAM vehicle is exhibiting any of the symptoms or DTCs mentioned in TSB 18-044-26, you should schedule an appointment with an authorized Stellantis dealership. The repair involves a software update to the PCM and is reimbursable under the provisions of the vehicle's warranty.