# Service bulletin S2621000002 REV.A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11030263
- Published by NHTSA: 2026\-03\-25
- Manufacturer's number: S2621000002 REV.A
- Manufacturer's date: 2026\-03\-19
- NHTSA component: ENGINE

## NHTSA's summary

The customer concern is Service Transmission, preventing the engine from shutting off. NOTE: The transmission will be in Park and able to hold the vehicle, but the cluster display would indicate Neutral, preventing the engine from shutting off.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030263-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030263-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2025 to 2026 RAM 2500
- 2025 to 2026 RAM 3500
- 2025 to 2026 RAM 4500
- 2025 to 2026 RAM 5500

## Other bulletins for the same vehicles and component

- [25\-004\-26 REV. A](/bulletins/11037580.md), 2026-09-30, Service bulletin: ENGINE; ELECTRICAL SYSTEM. Exhaust Gas Temperature \(EGT\) Sensor Water Intrusion ’s VIN MUST be listed in VIP or your RSU VIN list. NOTE: This bulletin applies to ● The Vehicle MUST be built on or before February 16, 2026 \(MDH North America, Enlarged 0216XX\). Europe, Middle East \& ● The vehicle MUST be equipped with a 6.7L I6 Cummins Turbo Africa, and India \& Asia Diesel Engine \(Sales Codes ETM or ETN\). Pacific markets. CUSTOMER Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P2482\-00 \- Exhaust Gas Temperature Sensor Circuit High \- Bank 1 Sensor 5. Customers may also comment on the following: ● Soot load is too high and power derate occurs due to regen being disabled. This bulletin involves replacing the EGT sensors.
- [9100922](/bulletins/11037476.md), 2026-09-23, Service bulletin: ENGINE; ELECTRICAL SYSTEM. SENSOR Exhaust Temperature If this sensor is being replaced due to an early\-life P242B pending fault code, clear the fault code and perform the Powertrain Verification Test. Only replace the sensor if P242B returns as an active fault code.
- [25\-004\-26](/bulletins/11037339.md), 2026-09-17, Service bulletin: ELECTRICAL SYSTEM; ENGINE. Exhaust Gas Temperature \(EGT\) Sensor Water Intrusion CUSTOMER Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P2482\-00 \- Exhaust Gas Temperature Sensor Circuit High \- Bank 1 Sensor 5. Customers may also comment on the following: ● Soot load is too high and power derate occurs due to regen being disabled. This bulletin involves replacing the EGT sensors.
- [07\-006\-26 REV. A](/bulletins/11037272.md), 2026-09-10, Service bulletin: ENGINE. Engine Overheat Customers may comment on the following: SYMPTOM: ● Vehicle overheating. ● Temperature gauge is reading hot. ● Overheat symbol is illuminated in Instrument Panel Cluster \(IPC\). This bulletin involves inspecting the thermostat housing part number and, if necessary, replacing the thermostat.
- [114254](/bulletins/11036754.md), 2026-09-03, Service bulletin: ENGINE. RADIATOR \- ENGINE COOLING
- [114255](/bulletins/11036753.md), 2026-09-03, Service bulletin: ENGINE. RADIATOR \- ENGINE COOLING
- [9100882](/bulletins/11036366.md), 2026-08-26, Service bulletin: ENGINE. PULLEY Fan If replacing 68209745AA, also replace 68723388AA, 05086958AB, and 68000833AD. Retain bolts, mark each with its original location, and submit a STAR ticket for parts return. Bolt P/Ns: 68005469AA, 03928873, 68445520AA, 04886003AA.
- [07\-006\-26](/bulletins/11036360.md), 2026-08-26, Service bulletin: ENGINE. Engine Overheat Customers may comment on the following: ● Vehicle overheating. ● Temperature gauge is reading hot. ● Overheat symbol is illuminated in Instrument Panel Cluster \(IPC\). This bulletin involves inspecting the thermostat housing part number and, if necessary, replacing the thermostat.
- [113754](/bulletins/11035982.md), 2026-08-06, Service bulletin: ELECTRICAL SYSTEM; ENGINE. SENSOR \- EXHAUST TEMPERATURE
- [113744](/bulletins/11035981.md), 2026-08-06, Service bulletin: ENGINE; ELECTRICAL SYSTEM. SENSOR \- TURBOCHARGER SPEED

JSON: [/v1/bulletins/11030263](/v1/bulletins/11030263)

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