# Service bulletin 18\-071\-24 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: 11008909
- Published by NHTSA: 2024\-10\-14
- Manufacturer's number: 18\-071\-24 REV. A
- Manufacturer's date: 2024\-10\-08
- NHTSA component: ENGINE; POWER TRAIN
- Manufacturer's system: Powertrain Control Module, Ignition System Control Module

## NHTSA's summary

"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 \(DTCs\): ● P018B \- Fuel Pressure Sensor ""B"" Circuit Range/performance. ● P2AF6 \- Starter Relay 3 Stuck Off. ● P1CEA \- Boost Side EVAP Purge System Performance. ● U0104 \- Lost Communication With Cruise Control Module and U0405 \- Invalid Data Received From Cruise Control Module may also be set. This software flash will allow these permanent fault codes to naturally clear. NOTE: If the software update is not completed, customers may have issues with registering vehicle in states with inspections due to the MIL being on \(Only an issue if U0104/U0405 have set in life of vehicle\). Other software improvements: ● Improvements related to fault codes P0300, P0301, P0302, P0303, P0304, P0305 and P0306 for cold start catalyst heating misfire. This bulletin involves reprogramming the PCM and Ignition System Control Module \(ISCM\) and the with the latest available software."

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11008909-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11008909-9999.pdf)

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

## Components

Engine, Transmission and driveline

## Trouble codes named

P018B, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P1CEA, P2AF6, U0104, U0405

## Vehicles listed

- 2025 RAM 1500

## Other bulletins for the same vehicles and component

- [18\-079\-26](/bulletins/11038536.md), 2026-10-16, Service bulletin: ENGINE. Flash: Powertrain Control Module \(PCM\) Update Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination, and the vehicle may exhibit SYMPTOM: or set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● 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. Customers may also comment on one or more of the following: ● Vehicle has a rough idle. ● Engine has a miss. ● Noisy valvetrain. This bulletin involves inspecting the PCM software level and, if necessary, reprogramming the PCM with the latest available software.
- [18\-071\-26 REV. B](/bulletins/11038534.md), 2026-10-16, Service bulletin: ENGINE. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P2237\-00 \- O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1. ● P2240\-00 \- O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1. ● P2251\-00 \- O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 1. ● P2254\-00 \- O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1. ● P2243\-00 \- O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1. ● P2247\-00 \- O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 1. ● P015B\-00 \- O2 Sensor Delayed Response \- Lean To Rich Bank 1 Sensor 1. ● P015D\-00 \- O2 Sensor Delayed Response \- Lean To Rich Bank 2 Sensor 1. ● P0E7C\-00 \- Coolant Bypass Valve "B" Control Circuit Low. ● P0E7D\-00 \- Coolant Bypass Valve "B" Control Circuit High. ● P0E7E\-00 \- Coolant Bypass Valve "B" Control Circuit Range/Performance. ● P0E7F\-00 \- Coolant Bypass Valve "B" Control Circuit Stuck/Open. ● U063C\-00 \- Lost Communication With Coolant Bypass Valve Actuator "B". ● P0100\-00 \- Mass Or Volume Air Flow Sensor "A" Circuit. ● P0101\-00 \- Mass Or Volume Air Flow Sensor "A" Circuit Range/Performance. ● P0461\-00 \- Fuel Level Sensor "A" Circuit Range/performance. ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low. ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance. ● B1810\-00 \- Driver Door Shorted Low. ● B25C7\-00 \- Redundant Driver Door Shorted Low. ● U0104\-00 \- Lost Communication With Cruise Control Module \(NA Market Only\) \(In Active or Stored status\). ● U0405\-00 \- Invalid Data Received From Cruise Control Module \(NA Market Only\) \(In Active or Stored status\). NOTE: Vehicles setting DTCs U0405\-00 and U0104\-00 may experience an inability to be cleared. ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.
- [18\-079\-26](/bulletins/11038499.md), 2026-10-16, Service bulletin: ENGINE. Flash: Powertrain Control Module \(PCM\) Update Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination, and the vehicle may exhibit SYMPTOM: or set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● 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. Customers may also comment on one or more of the following: ● Vehicle has a rough idle. ● Engine has a miss. ● Noisy valvetrain. This bulletin involves inspecting the PCM software level and, if necessary, reprogramming the PCM with the latest available software.
- [18\-071\-26 REV. B](/bulletins/11038497.md), 2026-10-16, Service bulletin: ENGINE. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P2237\-00 \- O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1. ● P2240\-00 \- O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1. ● P2251\-00 \- O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 1. ● P2254\-00 \- O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1. ● P2243\-00 \- O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1. ● P2247\-00 \- O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 1. ● P015B\-00 \- O2 Sensor Delayed Response \- Lean To Rich Bank 1 Sensor 1. ● P015D\-00 \- O2 Sensor Delayed Response \- Lean To Rich Bank 2 Sensor 1. ● P0E7C\-00 \- Coolant Bypass Valve "B" Control Circuit Low. ● P0E7D\-00 \- Coolant Bypass Valve "B" Control Circuit High. ● P0E7E\-00 \- Coolant Bypass Valve "B" Control Circuit Range/Performance. ● P0E7F\-00 \- Coolant Bypass Valve "B" Control Circuit Stuck/Open. ● U063C\-00 \- Lost Communication With Coolant Bypass Valve Actuator "B". ● P0100\-00 \- Mass Or Volume Air Flow Sensor "A" Circuit. ● P0101\-00 \- Mass Or Volume Air Flow Sensor "A" Circuit Range/Performance. ● P0461\-00 \- Fuel Level Sensor "A" Circuit Range/performance. ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low. ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance. ● B1810\-00 \- Driver Door Shorted Low. ● B25C7\-00 \- Redundant Driver Door Shorted Low. ● U0104\-00 \- Lost Communication With Cruise Control Module \(NA Market Only\) \(In Active or Stored status\). ● U0405\-00 \- Invalid Data Received From Cruise Control Module \(NA Market Only\) \(In Active or Stored status\). NOTE: Vehicles setting DTCs U0405\-00 and U0104\-00 may experience an inability to be cleared. ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.
- [S2609000006 REV.A](/bulletins/11038333.md), 2026-10-07, Service bulletin: ENGINE. Customer indicates Malfunction Indicator Light \(MIL\) or Check Engine Light \(CEL\) coming on.
- [S2621000004](/bulletins/11038329.md), 2026-10-07, Service bulletin: POWER TRAIN. The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tech May Find Damaged and/or Worn Transmission Output Shaft Splines \(850RE Transmission Only\)
- [18\-071\-26 REV. A](/bulletins/11038312.md), 2026-10-07, Service bulletin: POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P2237\-00 \- O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1. ● P2240\-00 \- O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1. ● P2251\-00 \- O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 1. ● P2254\-00 \- O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1. ● P2243\-00 \- O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1. ● P2247\-00 \- O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 1. ● P015B\-00 \- O2 Sensor Delayed Response \- Lean To Rich Bank 1 Sensor 1. ● P015D\-00 \- O2 Sensor Delayed Response \- Lean To Rich Bank 2 Sensor 1. ● P0E7C\-00 \- Coolant Bypass Valve "B" Control Circuit Low. ● P0E7D\-00 \- Coolant Bypass Valve "B" Control Circuit High. ● P0E7E\-00 \- Coolant Bypass Valve "B" Control Circuit Range/Performance. ● P0E7F\-00 \- Coolant Bypass Valve "B" Control Circuit Stuck/Open. ● U063C\-00 \- Lost Communication With Coolant Bypass Valve Actuator "B". ● P0100\-00 \- Mass Or Volume Air Flow Sensor "A" Circuit. ● P0101\-00 \- Mass Or Volume Air Flow Sensor "A" Circuit Range/Performance. ● P0461\-00 \- Fuel Level Sensor "A" Circuit Range/performance. ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low. ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance. ● B1810\-00 \- Driver Door Shorted Low. ● B25C7\-00 \- Redundant Driver Door Shorted Low.\*\* ● U0104\-00 \- Lost Communication With Cruise Control Module \(NA Market Only\) \(In Active or Stored status\). ● U0405\-00 \- Invalid Data Received From Cruise Control Module \(NA Market Only\) \(In Active or Stored status\). NOTE: Vehicles setting DTCs U0405\-00 and U0104\-00 may experience an inability to be cleared.
- [9100898](/bulletins/11037347.md), 2026-09-17, Service bulletin: ENGINE. Engine PNs: MY 24\-26 WD/DT \(5.7L\) Code P00B is being misdiagnosed and incorrect parts are being installed causing over repair. Refer to SOL S2609000006 The IAFM Foam Engine Valley Cover \(PN 53013735AB\) does not provide sufficient clearance for proper routing of the MDS solenoid jumper harness \(PN 05148163AE\). As a result, the harness may become compressed by the foam cover. To prevent unnecessary part replacement, the MDS solenoid jumper harness \(PN 05148163AE\) should be inspected for damage or pinch conditions prior to replacing the following part numbers: Engine PNs: 68409343AA 68409357AA 68450915AA OCV PNs: 53022338AB Phaser PNs: 53022298AA 53022298AB
- [S2418000012 REV.C](/bulletins/11037155.md), 2026-09-08, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Mil On/Check Engine Lamp \(CEL\) On, Engine Runs Rough
- [18\-077\-26](/bulletins/11036359.md), 2026-08-26, Service bulletin: POWER TRAIN; ENGINE. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P0300 \- Multiple Cylinder Misfire. Customers may experience one of the following: ● Vehicle runs rough on initial cold start only after an overnight or extended soak. \*\*This bulletin involves reprogramming the PCM with the latest available software.\*\*

JSON: [/v1/bulletins/11008909](/v1/bulletins/11008909)

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