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Service bulletin 18-015-20

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)
TypeService bulletin
NHTSA id10173378
Published by NHTSA2020-04-06
Manufacturer's number18-015-20
Manufacturer's date2020-02-22
NHTSA componentPOWER 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 Diagnostic Trouble Code (DTC) has been set:P0238-00 - Positive Boost Pressure Governor Deviation Low Pressure Signal Calculation Failure. Customer may also notice:Erratic engine idle. Premature alternator pulley failure. Other software enhancements include:Improvement to avoid soot formation in the intake system that can cause engine speed oscillation at idle. Improvement to the alternator strategy to prevent alternator pulley failure.

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

P0238

Vehicles listed
JEEP RENEGADE2020

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

Other bulletins for the same vehicles and component
21-040-252025-10-08. Service bulletin. 948TE Transmission Reaction Shaft Service Bushing Kit Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● P1DB7-00 - Torque Converter Clutch Performance.
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18016212023-01-17. Service bulletin. Flash: Powertrain Control Module (PCM) Updates
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