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18-031-25 REV. B

Manufacturer communications

Publication date
2025-09-27
Received by NHTSA
2025-10-02
NHTSA record numbers
11023602

Manufacturer summary

Original wording in English

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• **P00C6-00 - Fuel Rail Pressure Too Low - Engine Cranking - in ACTIVE or STORED status.
• P0325-00 - Knock/Combustion Vibration Sensor 1 Circuit - in ACTIVE or STORED status.
• P0330-00 - Knock/Combustion Vibration Sensor 2 Circuit - in ACTIVE or STORED status.
• P032A-00 - Knock-Combustion Vibration Sensor C Circuit - in ACTIVE or STORED status.
• P018B-00 - Fuel Pressure Sensor "B" Circuit Range/performance - in ACTIVE or STORED status.
• P2AF6-00 - Starter Relay 3 Stuck Off - in ACTIVE or STORED status.
• P0300-00 - Multiple Cylinder Misfire - in ACTIVE or STORED status set during cold start catalyst heating.
• P0301-00 - Cylinder 1 Misfire - in ACTIVE or STORED status set during cold start catalyst heating.
• P0302-00 - Cylinder 2 Misfire - in ACTIVE or STORED status set during cold start catalyst heating.
• P0303-00 - Cylinder 3 Misfire - in ACTIVE or STORED status set during cold start catalyst heating.
• P0304-00 - Cylinder 4 Misfire - in ACTIVE or STORED status set during cold start catalyst heating.
• P0305-00 - Cylinder 5 Misfire - in ACTIVE or STORED status set during cold start catalyst heating.
• P0306-00 - Cylinder 6 Misfire - in ACTIVE or STORED status set during cold start catalyst heating. NOTE: To confirm the cold start catalyst heating, use WiTech Freeze Frame data, and confirm "Time Since Engine Start" less than 30 seconds and "Engine Coolant Temperature °F" less than 122°F (50°C) when Misfire Code was set. See Step 3 for more details.
• U0104-00 - Lost Communication With Cruise Control Module - in ACTIVE or STORED status. This software flash will allow these permanent fault codes to naturally clear.
• U0405-00 - Invalid Data Received From Cruise Control Module - in ACTIVE or STORED status. This software flash will allow these permanent fault codes to naturally clear.** Customers may experience the following:
• A potential to stall when coming to a stop with an immediate restart. If the engine were to stall while stopping, a message would display in the Instrument Panel Cluster (IPC) informing the driver to shift to park to restart the engine This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.

NHTSA manufacturer communications ↗

Reported code forms

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

RamP018B-00
Fuel Pressure Sensor "B" Circuit Range/performance - in ACTIVE or STORED status

NHTSA 11023602

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

MakeModelModel year
Ram15002025

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