# Service bulletin 111405

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: 11031481
- Published by NHTSA: 2026\-04\-22
- Manufacturer's number: 111405
- Manufacturer's date: 2026\-04\-08
- NHTSA component: ENGINE

## NHTSA's summary

COVER \- CYLINDER HEAD

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031481-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031481-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2024 to 2026 CHRYSLER PACIFICA
- 2024 to 2026 CHRYSLER PACIFICA PLUG\-IN HYBRID
- 2024 to 2026 CHRYSLER VOYAGER
- 2024 to 2026 DODGE DURANGO
- 2024 to 2026 JEEP GLADIATOR
- 2024 to 2026 JEEP GRAND CHEROKEE
- 2024 to 2026 JEEP GRAND CHEROKEE L
- 2024 to 2026 JEEP WRANGLER
- 2024 to 2026 RAM 1500
- 2024 to 2026 RAM PROMASTER

## Recalls for the same vehicles and component

- [2025617](/recalls/tc/2025617.md), 2025-11-06: Engine
- [25V766000](/recalls/nhtsa/25V766000.md), 2025-11-06: ENGINE
- [24V926000](/recalls/nhtsa/24V926000.md), 2024-12-12: STRUCTURE:FRAME AND MEMBERS; FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY

## Other bulletins for the same vehicles and component

- [66D Combo Rev2](/bulletins/11038554.md), 2026-10-16, Service campaign: ENGINE. Revised Customer Satisfaction Notification 66D – Spark Plugs \- Dealer Notification
- [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\-015\-26 REV. A](/bulletins/11038533.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 \(DTCs\): ● 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 vehicle and, if required, reprogramming the PCM with the latest available software.
- [66D Combo Rev2](/bulletins/11038517.md), 2026-10-16, Service campaign: ENGINE. Revised Customer Satisfaction Notification 66D – Spark Plugs \- Dealer Notification
- [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.
- [18\-015\-26 REV. A](/bulletins/11038496.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 \(DTCs\): ● 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 vehicle and, if required, 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.
- [09\-013\-26 REV. A](/bulletins/11038310.md), 2026-10-07, Service bulletin: ENGINE. Engine Runs Rough 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 \(DTCs\): ● P0300\-00 \- Random/Multiple Cylinder Misfire Detected. ● P0301\-00 \- Cylinder 1 Misfire. ● P0302\-00 \- Cylinder 2 Misfire. ● P0303\-00 \- Cylinder 3 Misfire. ● P0304\-00 \- Cylinder 4 Misfire. Customers may also comment on the following: ● Engine runs rough. This bulletin involves replacing all four main chamber spark plugs.

JSON: [/v1/bulletins/11031481](/v1/bulletins/11031481)

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