# Service bulletin 18\-075\-26 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: 11038313
- Published by NHTSA: 2026\-10\-07
- Manufacturer's number: 18\-075\-26 REV. A
- Manufacturer's date: 2026\-10\-03
- NHTSA component: POWER TRAIN

## NHTSA's summary

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 \(DTCs\): ● P0111\-00 \- Intake Air Temperature Sensor 1 Circuit Performance \(In Active or Stored status\) ● P0071\-00 \- Ambient Air Temperature Sensor Performance \(In Active or Stored status\) ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High \(In Active or Stored status\) ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance ● P0E7E\-00 \- Coolant Bypass Valve B Control Circuit \(In Active or Stored status\) ● P2AF6\-00 \- Starter Relay 3 Stuck Off \(with PCR\). ● P00FD \- Battery B State Of Charge Performance. ● P013F\-00 \- O2 Sensor 2/1 Delayed Response \- Lean To Rich Bank. \(In Active or Stored status\) ● P014A\-00 \- O2 Sensor 2/2 Delayed Response \- Rich to Lean Bank. \(In Active or Stored status\) ● P013E\-00 \- O2 Sensor 2/1 Delayed Response \- Rich to Lean Bank. \(In Active or Stored status\) ● P014B\-00 \- O2 Sensor 2/2 Delayed Response \- Lean To Rich Bank. \(In Active or Stored status\) ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off.\(In Active or Stored status\) ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High. \(In Active or Stored status\) ● P0071\-00 \- Ambient Air Temperature Sensor Performance. \(In Active or Stored status\) ● P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected. \(In Active or Stored status\) ● P1CEA\-00 \- Boost Side EVAP Purge System Performance. \(In Active or Stored status\) ● P05BD\-00 \- Stop\-Start Mode Switch Range/Performance. \(In Active or Stored status\) ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking. \(In Active or Stored status\) ● U0673\-00 \- Lost Communication With Ion Sense Module. \(In Active or Stored status\) Customers may also comment on one or more of the following: ● High Elevation misfire. Electronic Start Stop \(ESS\) inoperative or "Auto Stop/Start Not Ready" message displayed in the Instrument Panel Cluster \(IPC\). NOTE: \*\*Normal Auto Stop/Start inhibit conditions should not be considered the cause of this concern. The condition is associated with DTC P2AF6.\*\* ● "Door Ajar" message on when door is closed. ● BSCM MIL illumination request not setting the MIL in the PCM High oil level indicator illuminated on the IPC. \*\*The following software enhancements are now available: ● Improvements to prevent misfire DTCs P0300\-P0306 that may set if one of the following DTCs set: ○ P0335\-00 \- Crankshaft Position Sensor Circuit. ○ P0336\-00 \- Crankshaft Position Sensor Performance.\*\* This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11038313-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11038313-9999.pdf)

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

## Components

Transmission and driveline

## Trouble codes named

P0071, P0073, P00C6, P00FD, P0111, P013E, P013F, P014A, P014B, P0300, P0306, P0335, P0336, P05BD, P062B, P06DD, P0E7E, P1CEA, P2AF6, P2C90, U0673

## Vehicles listed

- 2026 RAM 1500

## Other bulletins for the same vehicles and component

- [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 \(850RE Transmission Only\)
- [AOD COMBO](/bulletins/11038324.md), 2026-10-07, Service campaign: POWER TRAIN. Customer Satisfaction Notification A0D – Electronic Shift Module \- Dealer Notification The Electronic Shift Module \(ESM\) software on about 20,000 of the above vehicles may cause the rotary electronic shifter to become unresponsive. This condition may cause a "Service Shifter" message to appear on the instrument panel cluster and prevent the vehicle from starting.
- [21\-062\-26](/bulletins/11037573.md), 2026-09-30, Service bulletin: POWER TRAIN. Transmission Rattle Customers may comment on the following: SYMPTOM: ● Rattle noise coming from the transmission. This bulletin involves inspecting and possibly tightening the transmission oil heater mounting nuts to proper specification.
- [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
- [08\-308\-26](/bulletins/11036154.md), 2026-08-13, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Flash: Electronic Shift Module \(ESM\) Updates Customers may comment on one or more of the following: SYMPTOM: ● Shifter is unresponsive. ● Unable to start the vehicle. ● “Service Shifter” message displayed in the Instrument Panel Cluster \(IPC\). This bulletin involves inspecting and possibly reprogramming the ESM with the latest available software.
- [18\-075\-26](/bulletins/11035325.md), 2026-07-29, Service bulletin: POWER TRAIN; ENGINE. 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 \(DTCs\): ● \*\*P0111\-00 \- Intake Air Temperature Sensor 1 Circuit Performance \(In Active or Stored status\) ● P0071\-00 \- Ambient Air Temperature Sensor Performance \(In Active or Stored status\) ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High \(In Active or Stored status\) ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance ● P0E7E\-00 \- Coolant Bypass Valve B Control Circuit \(In Active or Stored status\)\*\* ● P2AF6\-00 \- Starter Relay 3 Stuck Off \(with PCR\). ● P00FD \- Battery B State Of Charge Performance. ● P013F\-00 \- O2 Sensor 2/1 Delayed Response \- Lean To Rich Bank. \(In Active or Stored status\) ● P014A\-00 \- O2 Sensor 2/2 Delayed Response \- Rich to Lean Bank. \(In Active or Stored status\) ● P013E\-00 \- O2 Sensor 2/1 Delayed Response \- Rich to Lean Bank. \(In Active or Stored status\) ● P014B\-00 \- O2 Sensor 2/2 Delayed Response \- Lean To Rich Bank. \(In Active or Stored status\) ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off.\(In Active or Stored status\) ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High. \(In Active or Stored status\) ● P0071\-00 \- Ambient Air Temperature Sensor Performance. \(In Active or Stored status\) ● P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected. \(In Active or Stored status\) ● P1CEA\-00 \- Boost Side EVAP Purge System Performance. \(In Active or Stored status\) ● P05BD\-00 \- Stop\-Start Mode Switch Range/Performance. \(In Active or Stored status\) ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking. \(In Active or Storedstatus\) ● U0673\-00 \- Lost Communication With Ion Sense Module.\(In Active or Stored status\) Customers may also comment on one or more of the following: ● \*\*High Elevation misfire. ● Electronic Start Stop \(ESS\) inoperative. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.
- [08\-226\-26 REV. A](/bulletins/11034315.md), 2026-07-02, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Flash: Electronic Shift Module \(ESM\) 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 \(DTCs\): ● P0607\-00 \- ECU Internal Performance. NOTE: DTC P0607\-00 will be stored in the Automatic Gearbox Shifter Module \(AGSM\)/Electronic Shift Module \(ESM\). ● P1DF3\-00 \- ECU Not Initialized. NOTE: DTC P1DF3\-00 will be stored in the Transmission Control Module \(TCM\). Customers may also comment on one or more of the following: ● Shifter not able to move out of Park with "Service Shifter" message showing on Instrument Panel Cluster \(IPC\). ● PRNDL lights flashing. \*\*This bulletin involves inspecting and possibly reprogramming the ESM with the latest software.\*\*
- [112748](/bulletins/11033955.md), 2026-06-18, Service bulletin: POWER TRAIN. SHIFTER \- TRANSMISSION
- [112747](/bulletins/11033954.md), 2026-06-18, Service bulletin: POWER TRAIN. SHIFTER \- TRANSMISSION
- [18\-059\-26](/bulletins/11033875.md), 2026-06-16, Service bulletin: POWER TRAIN. 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 \(DTCs\): ● \*\*P2AF6\-00 \- Starter Relay 3 Stuck Off \(with PCR\). ● P00FD \- Battery B State Of Charge Performance.\*\* ● P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected \(In Active or Stored status\). ● P0111\-00 \- Intake Air Temperature Sensor 1 Circuit Performance \(In Active or Stored status\). ● P0071\-00 \- Ambient Air Temperature Sensor Performance \(In Active or Stored status\). ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High \(In Active or Stored status\). ● U0673\-00 \- Lost Communication With Ion Sense Module \(In Active or Stored status\). ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off \(In Active or Stored status\). ● P1CEA\-00 \- Boost Side EVAP Purge System Performance \(In Active or Stored status\). ● P0E7E\-00 \- Coolant Bypass Valve B Control Circuit \(In Active or Stored status\). Customers may also experience \*\*one or more\*\* of the following: ● \*\*MIL on start\-up with no vehicle drivability impact.\*\* ● High oil level indicator illuminated on the Instrument Panel Cluster \(IPC\). This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.

JSON: [/v1/bulletins/11038313](/v1/bulletins/11038313)

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