# Service bulletin 9004447

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: 10204302
- Published by NHTSA: 2021\-12\-13
- Manufacturer's number: 9004447
- Manufacturer's date: 2021\-11\-17
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

COVER, Engine 2021 JL / JT Engine Cover Removal \- Dealer notification for removal of cover. Please note that the Aesthetic Engine Cover \(05281562AC\) has been removed on ALL JL/JT 3.6L Vehicle Configurations. Please note that a lack of engine cover matches engineering release. The engine cover will no longer be included on any 3.6L models of the JL/JT. Additionally, please note that it is OK to proceed to vehicle sale with the related front and rear engine cover brackets \(05281948AB, 05281949AB\) is OK. Brackets are not required to be removed prior to vehicle sale and will be removed from future vehicle builds. Please note that any dealer attempt to add an engine cover, or remove related bracketry, will be subject to dealer charge back for the associated costs.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10204302-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10204302-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2021 JEEP GLADIATOR
- 2021 JEEP WRANGLER

## Recalls for the same vehicles and component

- [22V865000](/recalls/nhtsa/22V865000.md), 2022-11-23: ENGINE
- [2022584](/recalls/tc/2022584.md), 2022-10-14: Engine
- [22V767000](/recalls/nhtsa/22V767000.md), 2022-10-13: ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

## Other bulletins for the same vehicles and component

- [9100363 Rev 3](/bulletins/11036762.md), 2026-09-03, Service bulletin: ENGINE. Turbocharger Kit Please note that many turbo components are serviceable separately and full turbo replacement may not be required. If the turbo is being inspected for: Noise/Rattle: Inspect heat shield fasteners for looseness and check the wastegate actuator/linkage for binding. The actuator kit is serviced separately. Oil Leak: Inspect the turbo oil feed O\-ring area for leaks. O\-ring is serviced separately.
- [113271](/bulletins/11035078.md), 2026-07-18, Service bulletin: ENGINE. CORE – HEATER
- [113270](/bulletins/11035077.md), 2026-07-18, Service bulletin: ENGINE. CORE – HEATER
- [112639](/bulletins/11034912.md), 2026-07-08, Service bulletin: ENGINE. THROTTLE BODY – NONE
- [112640](/bulletins/11034911.md), 2026-07-08, Service bulletin: ENGINE. THROTTLE BODY – NONE
- [S2609000009](/bulletins/11034345.md), 2026-07-02, Service bulletin: ENGINE. Check Engine Light \(CEL\) Illuminated with Diagnostic Trouble Code \(DTC\) P0106 Manifold Absolute Pressure Sensor Performance Setting In The Powertrain Control Module \(PCM\)
- [112842](/bulletins/11034335.md), 2026-07-02, Service bulletin: ENGINE. BOLT \- HEX FLANGE HEAD
- [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
- [18\-006\-26 REV.A](/bulletins/11029674.md), 2026-03-05, Service bulletin: ELECTRICAL SYSTEM; 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 \(DTCs\): ● P08A6 \- Gear Lever Position Sensor System – Multiple Sensor Correlation \(Manual Transmission Only\). ● P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. ● P0300 \- Multiple Cylinder Misfire. ● P152E \- Engine Hood Switch 2 Circuit High. ● P0032 \- O2 Sensor 1/1 Heater Circuit High. ● P0038 \- O2 Sensor 1/2 Heater Circuit High. ● P0052 \- O2 Sensor 2/1 Heater Circuit High. ● P0058 \- O2 Sensor 2/2 Heater Circuit High. ● P0132 \- O2 Sensor 1/1 Circuit High. ● P0138 \- O2 Sensor 1/2 Circuit High. ● P0152 \- O2 Sensor 2/1 Circuit High. ● P0158 \- O2 Sensor 2/2 Circuit High. ● P2100 \- Electronic Throttle Control Motor Circuit Customers may also comment on one or more of the following: ● "Service Transmission” message on in the Instrument Panel Cluster \(IPC\) due to clutch slip detection \(Manual Transmission Only\). NOTE: Customers might experience wheel spin or slippage and the PCM could interpreted the wheel spin or slippage as slipping the clutch too much and to avoid clutch damage, the customer may see the message in the IPC. ● Vehicle is in limp home mode. ● Spark knock/detonation sound from the engine at idle. Other software enhancements included: ● Engine oil pump in high pressure mode with cold engine oil to improve valvetrain component reliability. This bulletin involves reprogramming the PCM with the latest available software.
- [18\-005\-26 REV.A](/bulletins/11029673.md), 2026-03-05, Service bulletin: POWER TRAIN; ENGINE; ELECTRICAL SYSTEM. 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 \(DTCs\): ● P08A6 \- Gear Lever Position Sensor System – Multiple Sensor Correlation. \(Manual Transmission and NA Only\) ● P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. \(NA Only\) ● P0300 \- Multiple Cylinder Misfire. Customers may also comment on one or more of the following: ● "Service Transmission” message on in the Instrument Panel Cluster \(IPC\) due to clutch slip detection. \(Manual Transmission and NA Only\) NOTE: Customers might experience wheel spin or slippage and the PCM could interpreted the wheel spin or slippage as slipping the clutch too much and to avoid clutch damage, the customer may see the message in the IPC. ● Vehicle is in limp home mode.\(NA Only\) ● Spark knock/detonation sound from the engine at idle. Other software enhancements included: ● Engine oil pump in high pressure mode with cold engine oil to improve valvetrain component reliability. \(NA Only\) This bulletin involves reprogramming the PCM with the latest available software.

JSON: [/v1/bulletins/10204302](/v1/bulletins/10204302)

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