# Service bulletin 1804521

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: 10223484
- Published by NHTSA: 2022\-10\-17
- Manufacturer's number: 1804521
- Manufacturer's date: 2021\-05\-06
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience the following: After a short trip and shutting the engine off for 5 \- 10 minutes, vehicle exhibits a long crank/start condition.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10223484-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10223484-9999.pdf)

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

## Components

Electrical system, Transmission and driveline, Automatic transmission, Transmission control module

## Vehicles listed

- 2021 JEEP RENEGADE

## Other bulletins for the same vehicles and component

- [1809723](/bulletins/10243282.md), 2023-10-02, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Powertrain Control Module \(PCM\) Replacement Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\): ? U0100\-00 \- Lost Communication with Engine Control Module \(ECM\). ? U1701\-87 \- Engine Control Module \(ECM\) \- Missing message. Customer may also experience: ? Vehicle no start condition. This bulletin involves replacement of the PCM for a possible no start condition.
- [1800822](/bulletins/10230544.md), 2023-01-23, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Powertrain Control Module \(PCM\) Updates
- [2101322REVA](/bulletins/10225269.md), 2022-10-31, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE. Flash: Transmission Control Module \(TCM\) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience one or more of the following: Possible engine stall when shifted into neutral at a stop \(APAC and EMEA Only\). Harsh 1\-2 or 3\-4 upshifts.
- [S2125000002](/bulletins/10221288.md), 2022-09-26, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Customer complaint includes a Mil\-on condition. Upon further investigation, one or more of the following fault codes may be set in the PCM:
- [0900121REVA](/bulletins/10220599.md), 2022-09-26, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:CLUTCHES/BANDS. Clutch Pedal Position Sensor And Neutral Sensor Relearn This bulletin involves performing a relearn on the clutch pedal position and neutral sensors.
- [18\-097\-22](/bulletins/10214623.md), 2022-06-27, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM; POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); EQUIPMENT ADAPTIVE/MOBILITY. Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find the following DiagnosticTrouble Code \(DTC\) has been set: P0031 \- O2 Sensor 1/1 Heater Circuit Low.
- [S2125000002](/bulletins/10212447.md), 2022-05-31, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Customer complaint includes a Mil\-on condition. Upon further investigation, one or more of the following fault codes may be set in the PCM:

JSON: [/v1/bulletins/10223484](/v1/bulletins/10223484)

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