2023-2026 Jeep, RAM, Dodge Start/Stop System Fault P152E P152F

Owners of certain 2023-2026 Jeep, RAM, and Dodge vehicles may encounter a Jeep Start/Stop system fault indicated by a Malfunction Indicator Lamp (MIL) illumination or other warnings. This issue is specifically addressed by Manufacturer Communication 9100599, which outlines diagnostic and repair steps for technicians.

Symptoms

If you own a 2023-2026 Jeep, RAM, or Dodge vehicle, you might experience several symptoms related to an underhood switch issue. The most common sign is a Malfunction Indicator Lamp (MIL) illuminating on your dashboard, indicating a general system fault. Beyond the MIL, specific messages or behaviors may include a "Start/Stop system warning light" appearing, the vehicle's start/stop functionality becoming "Start/Stop inoperable", or the "Remote start inoperable" feature failing to work as expected. These symptoms collectively point towards a potential problem with the underhood start/stop safety system.

Fault Codes / DTCs

When a Jeep Start/Stop system fault occurs, a technician investigating the issue with a scan tool may find specific Diagnostic Trouble Codes (DTCs). The primary DTC associated with this problem is P152E Engine -Hood Switch 2 Circuit High. Additionally, the related DTC P152F may also be present. These codes directly indicate an electrical circuit issue with the hood switch, which is a critical component of the vehicle's start/stop system.

Diagnosis

Diagnosing this Jeep Start/Stop system fault requires a systematic approach. Technicians should utilize a wiTECH scan tool or an equivalent diagnostic device. It's crucial to access the appropriate Diagnostic Procedures available in DealerCONNECT/Service Library to ensure all related systems are functioning correctly. If any DTCs or symptom conditions other than P152E or P152F are present, these should be recorded and repaired first before proceeding with the specific steps outlined in Manufacturer Communication 9100599. This ensures that the underlying cause is correctly identified and addressed.

Repair Procedure Summary

The repair procedure for this underhood switch issue involves several steps to ensure proper functionality of the start/stop system. First, the technician will locate the hood switch. They will then disengage the two locking tabs and carefully pull the switch out, followed by disconnecting its wire connector. The wires are then connected to the same hood switch, and the switch is pushed back into its housing until both lock tabs are securely engaged. After reassembly, all DTCs that may have been set in any module during this repair procedure must be cleared. If DTCs P152F/P152E persist, the procedure is repeated with a new, spare, or known good hood switch. If the DTCs are not present after this, the original switch is reinstalled, and no documentation of a switch change is made in the repair narrative.

Required Tools or Parts

To properly diagnose and repair the Jeep Start/Stop system fault, specific tools and parts are necessary. Technicians will need a wiTECH scan tool or an equivalent diagnostic tool to read and clear DTCs and verify system functionality. The replacement parts involved are the underhood hood switches, identified by Part Numbers 68342252A$ and 68541273A$. Having a new, spare, or known good switch on hand is essential for troubleshooting and ensuring the repair is effective.

Important Warnings

Owners and technicians should be aware of a critical instruction regarding the repair process. If, after performing the diagnostic and repair steps, the DTCs P152F/P152E are no longer present, the original hood switch should be left installed in the vehicle. Furthermore, the change of the switch should not be documented in the repair process or narrative. This prevents unnecessary parts replacement and ensures accurate service records.

Owner Action

If you are experiencing a Malfunction Indicator Lamp (MIL) illumination, a "Start/Stop system warning light", or issues with your start/stop or remote start system in your 2023-2026 Jeep, RAM, or Dodge vehicle, it is recommended to visit an authorized dealership. They have the specialized tools and training to diagnose the Jeep Start/Stop system fault using Manufacturer Communication 9100599 and perform the necessary repairs.

Source: NHTSA ID: 11018666