# Service bulletin 21\-010\-26

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: 11028240
- Published by NHTSA: 2026\-02\-04
- Manufacturer's number: 21\-010\-26
- Manufacturer's date: 2026\-01\-27
- NHTSA component: POWER TRAIN

## NHTSA's summary

Flash: Transmission Control Module \(TCM\) Updates Customers may also experience one or more of the following: ● Customer is unable to switch the ignition to OFF when in Park gear. ● After shifting into Park, the Instrument Panel Cluster \(IPC\) will display that the transmission is in Neutral. NOTE: The transmission will actually be in Park and able to hold the vehicle, but the cluster display would indicate Neutral, preventing the engine from shutting off. This bulletin involves inspecting and possibly reprogramming the TCM with the latest available software.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11028240-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11028240-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2026 RAM 3500

## Other bulletins for the same vehicles and component

- [114739](/bulletins/11037595.md), 2026-09-30, Service bulletin: POWER TRAIN. TRANSMISSION KIT \- WITH TORQUE CONVERTER
- [08\-302\-26](/bulletins/11035977.md), 2026-08-06, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Flash: Electronic Shift Module \(ESM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● U1057\-00 \- High Speed Fd\-Can3 Communication Bus Performance. Customers may also comment on the following: ● If the vehicle has a low or drained battery and requires a jump start, once jump started, the vehicle will not shift out of Park. This bulletin involves reprogramming the ESM with the latest available software.
- [18\-067\-26 REV. A](/bulletins/11035175.md), 2026-07-23, Service bulletin: POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0088\-00 \- Fuel Rail Pressure Too High \- Bank 1. ● P208B\-00 \- Reductant Pump 1 Control Performance. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.
- [S2523000088 REV.B](/bulletins/11035086.md), 2026-07-18, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Vehicle Shifter Will Not Shift Out Of Park.
- [18\-067\-26](/bulletins/11035055.md), 2026-07-18, Service bulletin: ENGINE; POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0088\-00 \- Fuel Rail Pressure Too High \- Bank 1. ● P208B\-00 \- Reductant Pump 1 Control Performance. ● P2540\-00 \- Low Pressure Fuel System Sensor Circuit Range/Performance. ● P0506\-00 \- Idle Control System RPM \- Lower Than Expected. ● P20CF\-00 \- Exhaust Aftertreatment Fuel Injector "A" Stuck Open. ● P20DB\-00 \- Exhaust Aftertreatment Fuel Supply Control Stuck Open. ● P040B\-00 \- EGR Temperature Sensor 1 Circuit Performance. ● U0109\-00 \- Lost Communication With Fuel Pump Control Module. ● P1451\-00 \- Diesel Particulate Filter System Performance. ● P2463\-00 \- Diesel Particulate Filter Restriction \- Soot Accumulation Bank 1. ● P1191\-00\-Inlet Air Temperature Sensor Rational/Performance. ● P242F\-00\-Diesel Particulate Filter Restriction \- Ash Accumulation. ● P229F\-00 \- NOX Sensor Circuit Range/Performance \- Bank 1. ● P2281\-00 \- Air Leak Between MAF And Throttle Body. ● P0087\-00 \- Fuel Rail Pressure Too Low. ● P2540\-00 \- Low Pressure Fuel System Sensor Circuit Range/Performance. ● P2543\-00 \- Low Pressure Fuel System Sensor Circuit Intermittent. ● P214D\-00 \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. ● P242B\-00 \- Exhaust Gas Temperature Sensor Circuit Performance \- Bank 1 Sensor 3. ● P24DA \- Particulate Matter Sensor Exhaust Sample Error Bank 1. ● P20EE\-00 \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1 Catalyst 1. ● P226C\-00 \- Turbocharger Boost Control "A" Slow Response. ● P2281\-00 \- Air Leak Between Maf And Throttle Body. ● P229F\-00 \- Nox Sensor Circuit Range/performance \- Bank 1. ● P0100\-00 \- Mass Or Volume Air Flow Sensor "A" Circuit. ● P203F\-00 \- Reductant Level Too Low. ● P0423\-00 \- Heated Catalyst Efficiency Below Threshold Bank 1. ● P06B9\-00 \- Cylinder 1 Glow Plug Circuit Performance. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.
- [18\-025\-26 REV. B](/bulletins/11035053.md), 2026-07-18, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0088\-00 \- Fuel Rail Pressure Too High \- Bank 1. ● P208B\-00 \- Reductant Pump 1 Control Performance. ● P2540\-00 \- Low Pressure Fuel System Sensor Circuit Range/Performance. ● P0506\-00 \- Idle Control System RPM \- Lower Than Expected. ● P20CF\-00 \- Exhaust Aftertreatment Fuel Injector "A" Stuck Open. ● P20DB\-00 \- Exhaust Aftertreatment Fuel Supply Control Stuck Open. ● P040B\-00 \- EGR Temperature Sensor 1 Circuit Performance. ● U0109\-00 \- Lost Communication With Fuel Pump Control Module. ● P1451\-00 \- Diesel Particulate Filter System Performance. ● P2463\-00 \- Diesel Particulate Filter Restriction \- Soot Accumulation Bank 1. ● P1191\-00 \- Inlet Air Temperature Sensor Rational/Performance. ● P242F\-00 \- Diesel Particulate Filter Restriction \- Ash Accumulation. ● P229F\-00 \- NOX Sensor Circuit Range/Performance \- Bank 1. ● P2281\-00 \- Air Leak Between MAF And Throttle Body. ● P0087\-00 \- Fuel Rail Pressure Too Low. ● P2540\-00 \- Low Pressure Fuel System Sensor Circuit Range/Performance. ● P2543\-00 \- Low Pressure Fuel System Sensor Circuit Intermittent. ● P214D\-00 \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. ● P242B\-00 \- Exhaust Gas Temperature Sensor Circuit Performance \- Bank 1 Sensor 3. ● P24DA \- Particulate Matter Sensor Exhaust Sample Error Bank 1. ● P20EE\-00 \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1 Catalyst 1. ● P226C\-00 \- Turbocharger Boost Control "A" Slow Response. ● P2281\-00 \- Air Leak Between Maf And Throttle Body. ● P229F\-00 \- Nox Sensor Circuit Range/performance \- Bank 1. ● P0100\-00 \- Mass Or Volume Air Flow Sensor "A" Circuit. ● P203F\-00 \- Reductant Level Too Low. ● P0423\-00 \- Heated Catalyst Efficiency Below Threshold Bank 1. ● P06B9\-00 \- Cylinder 1 Glow Plug Circuit Performance. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.
- [18\-061\-26 REV. A](/bulletins/11034904.md), 2026-07-08, Service bulletin: POWER TRAIN. SA Market Only \- Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P0088\-00 \- Fuel Rail Pressure Too High \- Bank 1.\*\* ● P0263\-00 \- Cylinder 1 Contribution/Balance. ● P0266\-00 \- Cylinder 2 Contribution/Balance. ● P0269\-00 \- Cylinder 3 Contribution/Balance. ● P0272\-00 \- Cylinder 4 Contribution/Balance. ● P0275\-00 \- Cylinder 5 Contribution/Balance. ● P0278\-00 \- Cylinder 6 Contribution/Balance. Customers may also comment one or more of the following: ● The engine runs rough and exhibits stumbling and shaking. ● Loss of power. NOTE: The perceived loss of power is due to an insufficient injector/torque response. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.
- [S2523000055 REV.D](/bulletins/11034387.md), 2026-07-02, Service bulletin: POWER TRAIN; SERVICE BRAKES. Mil\-On/Check Engine Lamp \(CEL\), Antilock Brake System \(ABS\) Lamp, Diagnostic Trouble Code \(DTCs\).
- [9100841 Rev 1](/bulletins/11034380.md), 2026-07-02, Service bulletin: POWER TRAIN. If customer concern diagnosis leads to suspect u\-joint issue with the prop shaft, u\-joint service kit should be utilized to fix concern. Prop shaft replacement would not be required.
- [18\-002\-26 REV. B](/bulletins/11034356.md), 2026-07-02, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P219A \- Bank 1 Air\-Fuel Ratio Imbalance Bank 1. ● P219B \- Bank 2 Air\-fuel Ratio Imbalance. NOTE: This revision has an updated and more effective fix for DTC P219B than the prior version. Customers may also comment on one or more of the following: ● \*\*Power Take\-Off \(PTO\) may cancel during engagement with high PTO loads.\*\* ● PTO not auto\-resuming after hard\-wired remote start \(DD/DP Only\). ● Engine speed surging, unstable, or oscillating while coasting at low vehicle speeds. ● Stationary Idle PTO feature is not activating when the user configuration is selected to require parking brake be set \(DD/DP Only\). In addition, the following software enhancement\(s\) is available: ● Increase the duration that Power Takeoff related messages are displayed on the Instrument Panel Cluster \(IPC\) \(DD/DP Only\) \*\*This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.\*\*

JSON: [/v1/bulletins/11028240](/v1/bulletins/11028240)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2021-010-26&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11028240&vehicle=Service%20bulletin%2021-010-26)