# P242B on the 2026 Ram 5500

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P242B

- [11037476](https://open.wenmarpro.com/bulletins/11037476), 2026-09-23: 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.
- [11031238](https://open.wenmarpro.com/bulletins/11031238), 2026-04-10: Active/Pending Diagnostic Trouble Code \(DTC\) P24A0, P2482, P2481, P0420, P2470, P2471, P2472, P242D, P242B, P244D, P1484 And/or P214D setting In The Powertrain Control Module \(PCM\)
- [11023088](https://open.wenmarpro.com/bulletins/11023088), 2025-09-10: Powertrain Contol Module Over The Air Update to V2B \(Diesel Only\) Software Version \(FOTA\) 2025 \- 2026 \(DJ\) RAM 2500 Pickup 2025 \- 2026 \(D2\) RAM 3500 Pickup 2025 \- 2026 \(DD\) RAM 3500 Cab Chassis 2025 \- 2026 \(DF\) RAM 3500 10K Lb. Cab Chassis2025 \- 2026 \(DP\) RAM 4500/5500 Cab Chassis Customers may experience one or more of the following: \- Power Inverter \(110V connection\) drops out when shifting from P to D \- DEF \(Diesel Exhaust Fluid\) level gauge inaccuracy \- Poor cold start performance \- Instrument Panel Cluste MIL \(Malfunction Indicator Light\) ON; Possible P\-codes: P0087/P2540/P2543 Fuel Pressure P214D/P242B SCR Temperature P24DA PM Sensor P20EE SCR Efficiency P226C/P2281 Mass Charge Flow P229F System Outlet NOx Sensor P0100 MAF Sensor P203F DEF Level P0423 DOC Efficiency