Service bulletin 1800620REVA

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10221900
Published by NHTSA	2022-09-26
Manufacturer's number	1800620REVA
Manufacturer's date	2020-08-29
NHTSA component	POWER TRAIN

NHTSA's summary

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 DTC.P1614-00 - ECU Reset-Recovery Occurred(North America Only). Customers may experience 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(Sales Code NH2).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(Sales Code NH2).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Trouble codes named

P1614

Vehicles listed
JEEP CHEROKEE	2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
2026224	2026-05-07. Powertrain
26V290000	2026-05-07. POWER TRAIN

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
S1721000016 REV.B	2025-12-23. Service bulletin. Service 4wd Light On, AWD System Service Required Message Illuminated. Diagnostic Trouble Code (DTC) C14A7-97 PTU Motor Component Or System Operation Obstructed Or Blocked.
08-220-24	2024-10-08. Service bulletin. "Flash: Drivetrain Control Module (DTCM) Updates Customers may experience the following: ● A moan noise or shudder feeling from the rear axle during low speed cornering, most notable in a parking lot or low speed maneuvering. This bulletin involves reprogramming the DTCM with the latest available software."
1806423	2023-07-31. Service bulletin. 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.
S2308000009	2023-02-13. Service bulletin. Electric Power Steering (EPS) Will Not Calibrate, Negative Response Error Code 0X10
1805620	2023-01-09. Service bulletin. 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.
2104220	2023-01-09. Service bulletin. 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.
S2021000004	2023-01-09. Service bulletin. Valve Body Learn Procedure On WiTech Shows The Transmission Is Not In The Proper Gear After Repairs
1807922	2022-12-19. Service bulletin. 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).
9004335	2022-10-17. Service bulletin. Turbocharger If the turbo is being replaced for an oil leak concern, please inspect the area around the turbo oil feed o-ring for a leak. The o-ring is serviced separately and complete turbo replacement may not be necessary.
2302620	2022-10-17. Service bulletin. Rear Wheels Rubbing On Splash Shields/Wheel Liners This bulletin involves inspecting for the wrong size tire and wheel assemblies and possibly replacing all five wheel assemblies, Tire Pressure Monitoring (TPM) sensors, flashing the Electronic Power Steering (EPS) and performing a Proxi alignment. Customers may experience the following condition:The rear 17 in. tires are rubbing on the wheel liners. This condition is due to an incorrect 17 in. tire and wheel size, for the North Edition packages that require 18 in. tires and wheels.