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Service bulletin ISA-20-03 R02

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 id10183446
Published by NHTSA2020-12-02
Manufacturer's numberISA-20-03 R02
Manufacturer's date2020-11-05
NHTSA componentELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); EQUIPMENT

NHTSA's summary

Indian Motorcycle has identified a potential calibration issue affecting some 111/116 c.i. motorcycles. In some instances, the throttle twist grip and Electronic Throttle Control (ETC) position signals do not align with the predicted position within the ECM and set a P1530 fault (throttle plausibility). When active, the P1530 fault causes the motorcycle to operate in a reduced power (limp) mode.

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

Electrical system, Engine, Equipment and accessories, Engine control module

Trouble codes named

P1530

Vehicles listed
INDIAN CHIEF2019 to 2020
INDIAN CHIEF DARK HORSE2019
INDIAN CHIEF VINTAGE2019
INDIAN CHIEFTAIN2019 to 2020
INDIAN CHIEFTAIN DARK HORSE2019
INDIAN CHIEFTAN2019
INDIAN ROADMASTER2019 to 2020
INDIAN ROADMASTER ELITE2019
INDIAN SPRINGFIELD2019 to 2020
INDIAN SPRINGFIELD DARK HORSE2019
INDIAN VINTAGE2019

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