Home08-194-26 · RAM
RAM

08-194-26

Manufacturer communications

Publication date
2026-04-30
Received by NHTSA
2026-05-06
NHTSA record numbers
11032319

Manufacturer summary

Original wording in English

Flash: Ignition System Control Module (ISCM) 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):
• P2C30-00 - Ignition Coil Primary Circuit Fuse A.
• P2C31-00 - Ignition Coil Primary Circuit Fuse B.
• P0300-00 - Multiple Cylinder Misfire.
• P0301-00 - Cylinder 1 Misfire Detected.
• P0302-00 - Cylinder 2 Misfire Detected.
• P0303-00 - Cylinder 3 Misfire Detected.
• P0304-00 - Cylinder 4 Misfire Detected.
• P0305-00 - Cylinder 5 Misfire.
• P0306-00 - Cylinder 6 Misfire.
• P0420-00 - Catalyst System Efficiency Below Threshold Bank 1.
• P0430-00 - Catalyst System Efficiency Below Threshold Bank 2. Customers may also comment on the following:
• Engine hesitates/misfires This bulletin involves inspecting and possibly reprogramming the ISCM and the Powertrain Control Module (PCM) with the latest available software.

NHTSA manufacturer communications ↗

Reported code forms

P0300P0301P0302P0303P0304P0305P0306P0420P0430P2C30P2C31

Manufacturer wording

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

Check vehicle applicability

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

MakeModelModel year
Ram15002026

Data coverage →