# Service bulletin S1805000006 REV.B

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: 11025508
- Published by NHTSA: 2025\-11\-13
- Manufacturer's number: S1805000006 REV.B
- Manufacturer's date: 2025\-11\-03
- NHTSA component: SERVICE BRAKES

## NHTSA's summary

ESC Light Illuminated. DTC C1252\-92 VACUUM PUMP CONTROL CIRCUIT And Or P258B ELECTRONIC VACUUM PUMP PERFORMANCE

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11025508-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11025508-9999.pdf)

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

## Components

Brakes

## Trouble codes named

C1252, P258B

## Vehicles listed

- 2019 to 2023 JEEP CHEROKEE
- 2020 to 2026 JEEP GLADIATOR
- 2019 to 2026 JEEP WRANGLER
- 2020 to 2026 JEEP WRANGLER 4XE
- 2019 to 2026 RAM 1500

## Recalls for the same vehicles and component

- [2024503](/recalls/tc/2024503.md), 2024-09-05: Brakes
- [24V653000](/recalls/nhtsa/24V653000.md), 2024-09-05: ELECTRONIC STABILITY CONTROL \(ESC\):CONTROL MODULE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE
- [2021156](/recalls/tc/2021156.md), 2021-03-16: Brakes
- [21V037000](/recalls/nhtsa/21V037000.md), 2021-02-01: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
- [2019050](/recalls/tc/2019050.md), 2019-02-06: Brakes
- [19V067000](/recalls/nhtsa/19V067000.md), 2019-02-05: SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES
- [2018421](/recalls/tc/2018421.md), 2018-08-09: Brakes
- [18V523000](/recalls/nhtsa/18V523000.md), 2018-08-09: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER

## Other bulletins for the same vehicles and component

- [114911](/bulletins/11038552.md), 2026-10-16, Service bulletin: SERVICE BRAKES. ACTUATOR \- PARK BRAKE
- [114911](/bulletins/11038515.md), 2026-10-16, Service bulletin: SERVICE BRAKES. ACTUATOR \- PARK BRAKE
- [05\-003\-26](/bulletins/11036267.md), 2026-08-19, Service bulletin: SERVICE BRAKES. Brake Fluid Leak At The Brake System Control Module 2 \(BSCM2\) The customer may comment the following: SYMPTOM: ● Drops of brake fluid are on the ground. This bulletin involves tightening two BSCM2 brake line fittings.
- [08\-305\-26](/bulletins/11035978.md), 2026-08-06, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM. Flash: Brake System Control Module \(BSCM\) Updates \*\*Customers may experience one or more of the following: SYMPTOM: ● Warning message "Selec\-Speed Unavailable" appears in the Instrument Panel Cluster \(IPC\) when trying to enable the Selec\-Speed Control \(SSC\) function. NOTE: There will be no Diagnostic Trouble Codes \(DTCs\) and no driveability concerns with this symptom.\*\* ● Anti\-Lock Brake System \(ABS\), Electronic Stability Control \(ESC\) and 'Decel ACC' lights on in the IPC. Technicians may also find the following: ● DTC C121A\-00 \- Steering Angle Sensor Not Initialized \- Is stored with no Malfunction Indicator Lamp \(MIL\). This bulletin involves reprogramming the BSCM with the latest available software.
- [56D Combo](/bulletins/11035200.md), 2026-07-23, Service campaign: SERVICE BRAKES. Customer Satisfaction Notification 56D – Antilock Brake System Control Module Software \- Dealer Notification
- [08\-269\-26](/bulletins/11035044.md), 2026-07-18, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM. R1L/R1H Trailer Brake Setting In Radio Cannot Be Changed Customers may experience the following: SYMPTOM: ● Trailer brake setting in radio cannot be changed.
- [113123](/bulletins/11034908.md), 2026-07-08, Service bulletin: SERVICE BRAKES. SPRING KIT \- DISC BRAKE PAD
- [08\-237\-26](/bulletins/11033943.md), 2026-06-18, Service bulletin: SERVICE BRAKES. Flash: Brake System Control Module \(BSCM\) Update Customers may comment on the following: ● Anti\-Lock Brake System \(ABS\), Electronic Stability Control \(ESC\), 'Decel ACC' lights on in Instrument Panel Cluster \(IPC\). Technicians may find the following: ● Diagnostic Trouble Code \(DTC\) "C121A\-00 \- Steering Angle Sensor Not Initialized" is stored with no Malfunction Indicator Lamp \(MIL\) illuminated This bulletin involves reprogramming the BSCM with the latest available software.
- [S2605000002](/bulletins/11030047.md), 2026-03-13, Service bulletin: SERVICE BRAKES. Whoosh Or Click Noise Heard From Brake Assembly eBooster When Pressing Brake Pedal And After A Recent Repair.
- [03D Campaign](/bulletins/11029785.md), 2026-03-05, Other: SERVICE BRAKES; ELECTRICAL SYSTEM. Fleet Campaign Parts Ordering Process \(03D\)

JSON: [/v1/bulletins/11025508](/v1/bulletins/11025508)

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