# Service bulletin 18\-027\-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: 11029756
- Published by NHTSA: 2026\-03\-05
- Manufacturer's number: 18\-027\-26
- Manufacturer's date: 2026\-02\-26
- NHTSA component: ENGINE; POWER TRAIN

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation, SYMPTOM: a technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: ● \*\*P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation.\*\* ● U0418\-00 \- Implausible Data Received From Brake System Control Module 1. ● P061A \- Level 2 Torque Performance. Customers may also experience one or more of the following: ● \*\*Engine Stop/Start \(ESS\) is inoperable.\*\* ● Battery depletes. ● Rough shifting while driving. ● Driveline bumps and rumbles when lightly applying the accelerator pedal in traffic or at other low vehicle speeds such as parking lot maneuvers. ● Transmission hard upshifts, rough/bump during low gear 1\-2 and 2\-3 at 40\-64 kph \(25\-40 mph\). This bulletin involves 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-11029756-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029756-9999.pdf)

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

## Components

Engine, Transmission and driveline

## Trouble codes named

P061A, P152F, U0418

## Vehicles listed

- 2021 CHRYSLER PACIFICA
- 2021 CHRYSLER VOYAGER

## Other bulletins for the same vehicles and component

- [113280](/bulletins/11035083.md), 2026-07-18, Service bulletin: ENGINE. HOSE AND TUBE \- EGR COOLANT
- [18\-044\-26](/bulletins/11030229.md), 2026-03-25, Service bulletin: 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 Range Performance Bank 1. \(In Active or Stored status\) ● P0071\-00 \- Ambient Air Temperature Sensor Performance. \(In Active or Stored status\) ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low. \(In Active or Stored status\) ● P0073\-00 \- Ambient Air Temperature Sensor Circuit "A" High. \(In Active or Stored status\) ● P0011\-00 \- Bank 1 Camshaft 1 Position Timing Over Advanced Or. \(In Active or Stored status\) ● P25E4\-00 \- B Camshaft Position \- Unable To Achieve Locked Position Bank 1. \(In Active or Stored status\) ● P05BD\-00 \- Stop\-Start Mode Switch Range/Performance. \(In Active or Stored status\) ● P0116\-00 \- Engine Coolant Temperature Sensor 1 Performance. \(In Active or Stored status\) ● P062B\-00 \- Internal Control Module Fuel Injector Control Performance. \(In Active or Stored status\) ● P0604\-00 \- Internal Control Module Random Access Memory Ram Error. \(In Active or Stored status\) ● P060C\-00 \- Internal Control Module Main Processor Performance. \(In Active or Stored status\)\*\* ● P018B\-00 \- Fuel Pressure Sensor "B" Circuit Range/performance. \*\*\(In Active or Stored status\)\*\* ● P1CEA\-00 \- Boost Side EVAP Purge System Performance. \*\*\(In Active or Stored status\)\*\* ● P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off. \*\*\(In Active or Stored status\)\*\* ● P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking. \*\*\(In Active or Stored status\)\*\* ● P0300\-00 \- Multiple Cylinder Misfire. \*\*\(In Active or Stored status\)\*\* Customers may also experience one or more of the following: ● \*\*Oil Level High Warning in the Instrument Panel Cluster \(IPC\).\*\* ● Fully Autonomous Parking Assist \(FAPA\) is not deactivated when accelerator pedal is pressed. ● Vehicle is not heating up fast enough at freezi
- [110447](/bulletins/11029764.md), 2026-03-05, Service bulletin: ENGINE. WATER PUMP
- [110448](/bulletins/11029763.md), 2026-03-05, Service bulletin: ENGINE. WATER PUMP
- [109997](/bulletins/11028781.md), 2026-02-12, Service bulletin: POWER TRAIN. ACTUATOR \- TRANSFER CASE
- [21\-014\-26](/bulletins/11028767.md), 2026-02-12, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Internal Transmission Wiring Connector Short And \*\*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 \(DTCs\): ● P0A3F\-00 \- Drive Motor A Position Sensor 1 Circuit. ● P0A43\-00 \- Drive Motor A Position Sensor Circuit Intermittent. ● P0A45\-00 \- Drive Motor B Position Sensor 1 Circuit. ● P0C1A\-00 \- Drive Motor B Torque Delivered Performance. Customers may also comment on the following: ● Vehicle is in limp mode.\*\* statement, Claims Data tables,
- [109727](/bulletins/11027837.md), 2026-01-28, Service bulletin: ENGINE. Water Pump \& Chain Case Cover
- [109724](/bulletins/11027836.md), 2026-01-28, Service bulletin: ENGINE. Water Pump \& Chain Case Cover
- [S2509000009](/bulletins/11025028.md), 2025-11-05, Service bulletin: ENGINE. Engine Oil Leak
- [21\-040\-25](/bulletins/11024056.md), 2025-10-08, Service bulletin: POWER TRAIN. 948TE Transmission Reaction Shaft Service Bushing Kit Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P1DB7\-00 \- Torque Converter Clutch Performance.

JSON: [/v1/bulletins/11029756](/v1/bulletins/11029756)

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