Service bulletin 18-047-20

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	10176577
Published by NHTSA	2020-06-22
Manufacturer's number	18-047-20
Manufacturer's date	2020-05-16
NHTSA component	ELECTRICAL SYSTEM; EQUIPMENT; ENGINE; FUEL SYSTEM, GASOLINE; SERVICE BRAKES, HYDRAULIC

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 one or more ofthe following DTCs:P2610 - PCM Internal Engine Off Timer Performance. P06EF - Engine Restart Performance. P0456 - EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. C1252 - Vacuum Pump Control Circuit - Performance Or Incorrect Operation. P06DA - Engine Oil Pressure Control Circuit. P06DD - Engine Oil Pressure Control Circuit Stuck Off. P06DE - Engine Oil Pressure Control Circuit Stuck On. B25C7 - Driver Door Ajar Switch 2 Circuit Low. B25C8 - Driver Door Ajar Switch 2 Circuit High. B25C9 - Driver Door Ajar Switch 2 Stuck Closed. B25CB - Driver Door Ajar Switch 1/Driver Door Ajar Switch 2 Correlation. C10D0 - Electronic Park Brake Module Deactivated. P0EA5 - DC/DC Converter 2 Performance. P0EA6 - DC/DC Converter 2 Over Temperature. P2299 - Brake Pedal Position/Accelerator Pedal Position Incompatible. U0128 - Lost Communication With Park Brake Control Module. U0151 - Lost Communication With Occupant Restraint Controller. U0416 - Implausible Data Received From Esp. U0418 - Implausible Data Received From Brake System Control Module 1. U0599 - Invalid Data Received From DC to DC Converter Control Module "A". U0299 - LOC With DC-DC Convertor 2. U1409 - Implausible LF WSS Received. U140A - Implausible RF WSS Received. U059A - Invalid Data Received From DC to DC Converter Control Module "B". C0542 - Brake Pressure Sensor 2 Circuit Low. C0543 - Brake Pressure Sensor 2 Circuit High. P258A - Electric Vacuum Pump Circuit (turn MIL off, switch to 1 trip fault). P0616 - Starter Control Circuit Low. P0617 - Starter Control Circuit High. P0607 - ECU Internal Performance. P3032 - Barometric Pressure Sensor Performance

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

Brakes, Electrical system, Engine, Equipment and accessories, Fuel system

Trouble codes named

B25C7, B25C8, B25C9, B25CB, C0542, C0543, C10D0, C1252, P0456, P0607, P0616, P0617, P06DA, P06DD, P06DE, P06EF, P0EA5, P0EA6, P2299, P258A, P2610, P3032, U0128, U0151, U0299, U0416, U0418, U0599, U059A, U1409, U140A

Vehicles listed
JEEP CHEROKEE	2019

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

Recalls for the same vehicles and component
18V917000	2018-12-20. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
2018573	2018-10-19. Engine
2018421	2018-08-09. Brakes
18V524000	2018-08-09. ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
18V523000	2018-08-09. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
2018282	2018-05-25. Engine
18V344000	2018-05-25. ENGINE AND ENGINE COOLING:ENGINE

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
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08-075-26	2026-03-05. Service bulletin. Rear Taillamp Condensation Clearing Procedure On occasion, vehicle exterior taillamp assemblies get fogged with a light layer of condensation on the SYMPTOM: inside of the lenses Fig. 1. This may be reported after the lamps have been turned on and brought up to operating temperature, turned off and then rapidly cooled by cold water (such as rain, or the water from a vehicle wash). Lens fogging can also occur under certain atmospheric conditions after a vehicle has been parked outside overnight (i.e. a warm humid day followed by clear cool night). This will usually clear as atmospheric conditions change to allow the condensation to change back into a vapor. Turning the taillamps on will usually accelerate this process. This bulletin is to communicate the procedure for rear taillamp condensation clearing.
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