# Service bulletin S2521000001

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: 11014094
- Published by NHTSA: 2025\-02\-11
- Manufacturer's number: S2521000001
- Manufacturer's date: 2025\-02\-08
- NHTSA component: POWER TRAIN
- Manufacturer's system: Clutch

## NHTSA's summary

Clutch Overheat, And/Or Service Transmission Illuminated. Diagnostic Trouble Code \(DTC\) P08A6 – Gear Lever Position Sensor System – Multiple Sensor Correlation, Set Only In 4Low.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014094-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014094-9999.pdf)

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

## Components

Transmission and driveline

## Trouble codes named

P08A6

## Vehicles listed

- 2020 to 2024 JEEP GLADIATOR

## Recalls for the same vehicles and component

- [24V572000](/recalls/nhtsa/24V572000.md), 2024-08-01: POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE:SOFTWARE
- [23V641000](/recalls/nhtsa/23V641000.md), 2023-09-18: POWER TRAIN:MANUAL TRANSMISSION
- [2023089](/recalls/tc/2023089.md), 2023-02-23: Powertrain
- [23V116000](/recalls/nhtsa/23V116000.md), 2023-02-23: POWER TRAIN:CLUTCH ASSEMBLY
- [22V639000](/recalls/nhtsa/22V639000.md), 2022-08-25: POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:PARK PAWL
- [2021035](/recalls/tc/2021035.md), 2021-01-28: Powertrain
- [21V028000](/recalls/nhtsa/21V028000.md), 2021-01-28: POWER TRAIN:CLUTCH ASSEMBLY
- [2020083](/recalls/tc/2020083.md), 2020-03-03: Powertrain
- [20V124000](/recalls/nhtsa/20V124000.md), 2020-03-03: POWER TRAIN:CLUTCH ASSEMBLY
- [2019438](/recalls/tc/2019438.md), 2019-08-29: Powertrain

## Other bulletins for the same vehicles and component

- [S2621000004](/bulletins/11038329.md), 2026-10-07, Service bulletin: POWER TRAIN. The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tech May Find Damaged and/or Worn Transmission Output Shaft Splines \(850RE Transmission Only\)
- [18\-045\-26](/bulletins/11031450.md), 2026-04-22, Service bulletin: POWER TRAIN; 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 \(DTCs\): ● \*\*P0300 \- Multiple Cylinder Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0301 \- Cylinder 1 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0302 \- Cylinder 2 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0303 \- Cylinder 3 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0304 \- Cylinder 4 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0305\-00 \- Cylinder 5 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0306\-00 \- Cylinder 6 Misfire \(Active or Stored status set during cold start catalyst heating\).\*\* ● P08A6 \- Gear Lever Position Sensor System \- Multiple Sensor Correlation. ● P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. ● P1129 \- Closed Loop Fueling Not Achieved \- Bank 2 Upstream. ● P0152\-02 \- O2 Sensor 2/1 Circuit High. ● P0158\-02 \- O2 Sensor 2/2 Circuit High. ● P2504 \- Charging System Output High. ● P0563 \- Battery/System Voltage High. Customers may also comment on one or more of the following: ● \*\*The vehicle has a rough idle. ● The engine has a miss. ● Noisy valvetrain. ● "Service Transmission" message in the Instrument Panel Cluster \(IPC\) due to clutch slip detection with the transfer case in neutral. NOTE: Some customers may experience wheel spin or traction loss. In these situations, the Powertrain Control Module \(PCM\) may interpret the event as excessive clutch slip. To prevent potential clutch damage, a message may be displayed in the Instrument Panel Cluster \(IPC\).\*\* ● Clutch is overheating. ● Clutch is slipping on engagement. M18 FSAR\-TSB\-7161 \-2\- ● Inability to accelerate uphill. ● Vehicle does not start. ● Vehicle is stuck in limp\-home mode
- [18\-007\-26 REV B](/bulletins/11031449.md), 2026-04-22, Service bulletin: ENGINE; POWER TRAIN. 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 \(DTCs\): ● \*\*P0301 \- Cylinder 1 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0302 \- Cylinder 2 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0303 \- Cylinder 3 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0304 \- Cylinder 4 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0305\-00 \- Cylinder 5 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0306\-00 \- Cylinder 6 Misfire \(Active or Stored status set during cold start catalyst heating\).\*\* ● P0300 \- Multiple Cylinder Misfire. ● P0032 \- O2\-Sensor 1/1 Heater Circuit High. ● P0038\-02 \- O2\-Sensor 1/2 Heater Circuit High. ● P0052\-02 \- O2\-Sensor 2/1 Heater Circuit High. ● P0058\-02 \- O2\-Sensor 2/2 Heater Circuit High. ● P0132\-02 \- O2 Sensor 1/1 Circuit High. ● P0138\-02 \- O2 Sensor 1/2 Circuit High. ● P0152\-02 \- O2 Sensor 2/1 Circuit High. ● P0158\-02 \- O2 Sensor 2/2 Circuit High. ● P2100 \- Electronic Throttle Control Motor Circuit. ● P2107 \- Electronic Throttle Control Module Processor. ● P0129 \- Barometric Pressure Out Of Range Low. China Market Only ● P08A6 \- Gear Lever Position Sensor System \- Multiple Sensor Correlation. \(Manual Transmission Only\). ● P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. ● P1129 \- Closed Loop Fueling Not Achieved \- Bank 2 Upstream. Customers may also comment on one or more of the following: ● \*\*The vehicle has a rough idle. ● The engine has a miss. ● Noisy valvetrain.\*\* J18 FSAR\-TSB\-7200 \-2\- ● "Service Transmission" message in the Instrument Panel Cluster \(IPC\) due to clutch slip detection with the transfer case in neutral \(Manual Transmission Only\). NOTE: Customers might experience wheel spin or slippage and the PCM could
- [S2603000001](/bulletins/11029774.md), 2026-03-05, Service bulletin: POWER TRAIN. A suspected leak may be noticed on the front or rear axle pinion seal.
- [S2621000003](/bulletins/11029770.md), 2026-03-05, Service bulletin: POWER TRAIN. Service transmission/check engine warning indicator for the 850RE, 8HP50, 8HP70, 8HP75, 8HP75\-PHEV transmissions that have fault codes P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
- [18\-007\-26 REV.A](/bulletins/11029675.md), 2026-03-05, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. 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. 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. 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.
- [9100749 Rev 1](/bulletins/11027741.md), 2026-01-21, Service bulletin: POWER TRAIN. We have observed that some JL/JT rear axle shafts are leaking oil. Replace axle shaft and seal together. Do not replace seal only. Keep original seal and axle shaft and send the parts as fast track.
- [18\-087\-25](/bulletins/11024052.md), 2025-10-08, Service bulletin: POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P08A6 \- Gear Lever Position Sensor System \- Multiple Sensor Correlation. ● P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. 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 with the transfer case in neutral. ● Driver might experience some wheels are slipping This bulletin involves reprogramming the PCM with the latest available software.
- [9100627](/bulletins/11020855.md), 2025-07-23, Service bulletin: POWER TRAIN. To inform dealers about the 850RE valve body PN: R8348504A connector: the original 16\-pin connector included six pins that were not used in this application. To simplify the design, the connector has been optimized and updated to a 10\-pin configuration.
- [21\-009\-25 REV. C](/bulletins/11020636.md), 2025-07-09, Service bulletin: POWER TRAIN. 850RE D Clutch Repair Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must have at least 11,265 km \(7,000 mi.\) and exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0733\-00 \- Gear 3 Shift Incorrect Ratio. ● P1DA8\-00 \- Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92\-00 \- Incorrect Gear Ratio \- Clutch 4 Defective. Customers may also comment on one or more of the following: ● Transmission slips when shifting. ● Vehicle will not move in reverse. ● Vehicle will not shift higher than third gear This bulletin involves replacing the D clutch.

JSON: [/v1/bulletins/11014094](/v1/bulletins/11014094)

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