# Service bulletin S2105000003

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: 10223440
- Published by NHTSA: 2022\-10\-17
- Manufacturer's number: S2105000003
- Manufacturer's date: 2021\-05\-21
- NHTSA component: SERVICE BRAKES

## NHTSA's summary

C1009 Brake Fluid Low DTC Red Brake Light On

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10223440-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10223440-9999.pdf)

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

## Components

Brakes

## Trouble codes named

C1009

## Vehicles listed

- 2021 JEEP GRAND CHEROKEE

## Other bulletins for the same vehicles and component

- [113123](/bulletins/11034908.md), 2026-07-08, Service bulletin: SERVICE BRAKES. SPRING KIT \- DISC BRAKE PAD
- [S2521000005](/bulletins/11026809.md), 2025-12-23, Service bulletin: SERVICE BRAKES; POWER TRAIN. The customer states the ABS and Traction Control warning comes on. Vehicle sets wheel speed BSCM/ABS fault codes.
- [S2308000141](/bulletins/10248873.md), 2024-01-16, Service bulletin: PARKING BRAKE. Park Brake Warning Lamp Illuminated and Flashing, Cluster Warning Message to ?Service Park Brake?
- [9004433](/bulletins/10242706.md), 2023-09-25, Service bulletin: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM; SERVICE BRAKES; ELECTRICAL SYSTEM. PUMP, Vacuum For DTC Code P258B \- ELECTRONIC VACUUM PUMP PERFORMANCE. Due to brake vacuum pumps returned with trouble not found, please follow the proper diagnostics outline in the service library this also includes checking all electrical and vacuum hose connections prior to replacement of the vacuum pump. This will avoid unnecessary repair and potential charge back on the vacuum pump.
- [S2308000076](/bulletins/10241015.md), 2023-08-21, Service bulletin: STEERING; ELECTRONIC STABILITY CONTROL:AUTOMATIC \(ASC\); SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT. Anti\-lock Brake System \(ABS\), Electronic Stability Lamp \(ESC\) Warning Lamps on, No Start, Decrease in Steering Assist ?Service Steering System Message?
- [08\-020\-23](/bulletins/10231797.md), 2023-02-13, Service bulletin: ELECTRICAL SYSTEM; EXTERIOR LIGHTING; STRUCTURE; SERVICE BRAKES; BACK OVER PREVENTION. Flash: Radio Frequency Hub Module \(RFHM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Code \(DTCs\) have been set: B21DD\-84 \- System Voltage\-Signal Below Allowable Range. B21DD\-85 \- System Voltage\-Signal Above Allowable Range. C151D\-00 \- Tire Pressure Sensor Location Undetermined. U1517\-87 \- Body Controller Secret Code\-Missing Message. B1A71\-01 \- Passive Entry Antenna 1\-General Electrical Failure. B1A72\-01 \- Passive Entry Antenna 2\-General Electrical Failure. B1A73\-01 \- Passive Entry Antenna 3\-General Electrical Failure. B1A74\-01 \- Passive Entry Antenna 4\-General Electrical Failure. B1A75\-01 \- Passive Entry Antenna 5\-General Electrical Failure. The customer may also experience one or more of the following: ?Fob Left Vehicle? message is displayed on Instrument Panel Cluster \(IPC\) after a remote start. Vehicle no\-starts. This bulletin involves updating the RFHM module with the latest available software
- [9100019](/bulletins/10230502.md), 2023-01-23, Service bulletin: SERVICE BRAKES; TRAILER HITCHES. Mopar trailer brake controller.
- [0805022REVA](/bulletins/10230346.md), 2023-01-17, Service bulletin: ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE; WHEELS; STEERING; STRUCTURE; PARKING BRAKE; VEHICLE SPEED CONTROL; VISIBILITY. Flash: Body Control Module \(BCM\) Updates This bulletin involves reprogramming the Body Control Module \(BCM\) with the latestavailable software. Customer may describe various LIN related functions \(steering wheel, center stack, terrain or 4wd\) switchesand/or certain interior lamps not working. Upon further inspection the technician may also observe the following DTCs may have set withouta MIL: U1223\-00 \- Lost Communication with Wireless Charging Pad Module. U121E\-00 \- Lost Communication With Steering Wheel Cruise Control Switch. U1207\-00 \- Lost Communication With Terrain Switch Bank Module. U1191\-00 \- Lost Communication with Switch Bank Module 2. U1153\-00 \- Lost Communication With Windshield Wiper Smart Module. U114F\-00 \- Lost Communication with LIN Overhead Console. U114D\-87 \- Lost Communication with Hands Free Liftgate Module\-Missing Message. U113B\-00 \- Lost Communication With Switch Bank Module. U112D\-00 \- Lost Communication With EVIC Steering Wheel Switches. U1125\-00 \- Lost Communication With LIN ECU 5\- \(Ride Height Switch Module\). U1123\-00 \- Lost Communication With LIN ECU 3\- \(Switch Bank Module Rear Right\). U1122\-00 \- Lost Communication With LIN ECU 2\- \(Switch Bank Module Rear Left\). U1008\-00 \- LIN 1 Bus Steering Column Control Module Electrical Diagnostic. U0231\-00 \- Lost Communication With Rain Sensing Module. In addition, the customer may experience one or more of the following:Fuel Level and Range \(distance to empty\) \(DTE\) will both increase aftersleep cycle. Fuel Level % would increase when parked on a slope. Fuel gauge remains at full for 107 km \(67 miles\) vs. 73 km \(45 miles\). After fueling up with 68 liters \(18.1 gallons\) of fuel, the fuel gauge onlywill read around 1/4 tank and the low fuel lamp is still illuminated. After 10 minutes of driving, the gauge only read around 3/4 tank andthe fuel lamp is still on. Refuel button is pressed for a short duration of 500ms or less at key off,then the fuel door is not opened.
- [S2123000061](/bulletins/10230237.md), 2023-01-17, Service bulletin: STEERING; PARKING BRAKE; WHEELS. Leather Steering Wheel Has Loose Material Poor Appearance
- [S2108000170](/bulletins/10230194.md), 2023-01-17, Service bulletin: PARKING BRAKE. Head unit button stuck DTC code B14DA\-2A

JSON: [/v1/bulletins/10223440](/v1/bulletins/10223440)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20S2105000003&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10223440&vehicle=Service%20bulletin%20S2105000003)