# Service bulletin 1805620

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: 10221776
- Published by NHTSA: 2022\-09\-26
- Manufacturer's number: 1805620
- Manufacturer's date: 2020\-07\-29
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; PARKING BRAKE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Customers may also experience the following condition:When the cruise control is engaged and the Active Vehicle Speed Limiter \(AVSL\) button is pressed, Instrument Panel Cluster \(IPC\) display skips ?Cruise Control Canceled? message and displays ?Speed Limiter Ready?. In addition the following software enhancement are included:Improved idle after a hot restart.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10221776-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10221776-9999.pdf)

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

## Components

Brakes, Electrical system, Transmission and driveline, Automatic transmission, Instrument cluster, Parking brake, Transmission control module

## Vehicles listed

- 2020 JEEP CHEROKEE

## Other bulletins for the same vehicles and component

- [1806423](/bulletins/10239967.md), 2023-07-31, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. Flash: Powertrain Control Module \(PCM\) 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 Codes \(DTC\)s: ? \*\*P24D1\-00 \-Particulate Matter Sensor Regeneration Incomplete. NOTE: This software update will help prevent P24D1\-00 from setting.
- [S2108000170](/bulletins/10230194.md), 2023-01-17, Service bulletin: PARKING BRAKE. Head unit button stuck DTC code B14DA\-2A
- [1805620](/bulletins/10229346.md), 2023-01-09, Service bulletin: POWER TRAIN; PARKING BRAKE; ELECTRICAL SYSTEM; BACK OVER PREVENTION:SOFTWARE. Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Customers may also experience the following condition:When the cruise control is engaged and the Active Vehicle Speed Limiter \(AVSL\) button is pressed, Instrument Panel Cluster \(IPC\) display skips ?Cruise Control Canceled? message and displays ?Speed Limiter Ready?. In addition the following software enhancement are included:Improved idle after a hot restart.
- [1807922](/bulletins/10228031.md), 2022-12-19, Service bulletin: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PRESSURE/TEMPERATURE SENSOR; POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE:SOFTWARE; POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; PARKING BRAKE; EXTERIOR LIGHTING. 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 one or more ofthe following DTCs have been set: P1D83 \- Implausible Engine Oil Temperature Signal Received. P2610 \- PCM Internal Engine Off Timer Performance. Customers may experience one or more of the following: An audible clunk after applying throttle from a coasting condition, predominantlyin fifth and sixth gear while driving 48 \- 72 kph \(30 \- 45 mph\). Software was updated to better address this condition. A message on the instrument cluster stating ?Speed limiter ready? afterthe first press of the speed limiter button and the Active Vehicle Speed Limiter \(AVSL\) is inoperative\(Equipped with NH2 Sales Code Only\). Inform the customer after the software update thatthe proper operative will be when the customer presses the speed limiter button twice, a messageon the instrument cluster stating ?Speed limiter ready? and the AVSL feature will work correctly \(Equipped with NH2 Sales Code Only\).
- [1808520REVA](/bulletins/10223951.md), 2022-10-17, Service bulletin: EXTERIOR LIGHTING; PARKING BRAKE; ELECTRICAL SYSTEM. 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 Diagnostic Trouble Code \(DTC\).P2610 \- PCM Internal Engine Off Timer Performance. Customers may experience one or more of the following:An audible clunk after applying throttle from a coasting condition, predominantly in fifth and sixth gear while driving 48 \- 72 kph \(30 \- 45 mph\). A message on the instrument cluster stating ?Speed limiter ready? after the first press of the speed limiter button and the Active Vehicle Speed Limiter \(AVSL\) is inoperative\(Equipped with NH2 Sales Code Only\).Inform the customer after the software update that the proper operative will be when the customer presses the speed limiter button twice, a message on the instrument cluster stating ?Speed limiter ready?and the AVSL feature will work correctly \(Equipped with NH2 Sales Code Only\).
- [2104220](/bulletins/10221760.md), 2022-09-26, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Flash: Transmission Control Module \(TCM\) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code \(DTC\) has been set:P1614\-00 \- ECU Reset\-Recovery Occurred.
- [S2108000170](/bulletins/10221608.md), 2022-09-26, Service bulletin: PARKING BRAKE. Head unit button stuck DTC code B14DA\-2A
- [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:
- [1802121](/bulletins/10220617.md), 2022-09-26, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. 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 Diagnostic Trouble Code \(DTC\).P2610 \- PCM Internal Engine Off Timer Performance. Customers may experience one or more of the following:An audible clunk after applying throttle from a coasting condition, predominantly in fifth and sixth gear while driving 48 \- 72 kph \(30 \- 45 mph\).Software was updated to better address this condition. A message on the instrument cluster stating ?Speed limiter ready? after the first press of the speed limiter button and the Active Vehicle Speed Limiter \(AVSL\) is inoperative\(Equipped with NH2 Sales Code Only\).Inform the customer after the software update that the proper operative will be when the customer presses the speed limiter button twice, a message on the instrument cluster stating ?Speed limiter ready? and the AVSL featurewill work correctly \(Equipped with NH2 Sales Code Only\).
- [2500119](/bulletins/10220069.md), 2022-09-15, Service bulletin: FUEL SYSTEM, DIESEL; FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Instrument Panel Cluster \(IPC\) Message about Diesel Particulate Filter \(DPF\) Regeneration

JSON: [/v1/bulletins/10221776](/v1/bulletins/10221776)

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