BodyB1603

Caution

Severity: Caution - get it checked when you can

Alternator charging failure

27 brands affected · Description from Toyota data.

Safety: This code relates to the charging system. The battery may go flat and the car may stall.

1What it means in plain English

The alternator is not charging the battery the way it should, so the car is running on stored battery power.

2Common causes

Faulty alternator or voltage regulator
Worn or slipping alternator belt
Damaged charging circuit wiring or connector
Blown charging fuse
Loose or corroded battery terminals

3Can I drive?

Caution · drive with care

Drive straight to a workshop if the charging warning light is on: the battery will go flat and the car can stall or refuse to start. Avoid unnecessary electrical loads.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 27

Brand	Code	Description	System
Mercedes-Benz	B1603	No description available	Body
BYD	B1603	DR pretensioner squib short Brand	Body
Chery	B1603	DR pretensioner squib short Brand	Body
Chrysler	B1603	No description available	Body
Daewoo	B1603	No description available	Body
Daihatsu	B1603	Rear seat central pretensioner +B shorted Brand	Body
DFFS	B1603	Alternator charging failure Brand	Body
DFFX	B1603	DR pretensioner squib short Brand	Body
Geely	B1603	DR pretensioner squib short Brand	Body
GM	B1603	No description available	Body
Great Wall	B1603	DR pretensioner squib short Brand	Body
Hafei	B1603	DR pretensioner squib short Brand	Body
Holden	B1603	Generator Brand	Body
Honda	B1603	No description available	Body
Hyundai	B1603	No description available	Body
Land Rover	B1603	No description available	Body
Maserati	B1603	Right Solar Sensor-Performance or Incorrect Operation Brand	Body
Mitsubishi	B1603	DR pretensioner squib short Brand	Body
Opel	B1603	No description available	Body
Perodua	B1603	Rear seat central pretensioner +B shorted Brand	Body
Peugeot	B1603	No description available	Body
Proton	B1603	DR pretensioner squib short Brand	Body
Saab	B1603	No description available	Body
Sprinter	B1603	No description available	Body
Subaru	B1603	No description available	Body
Suzuki	B1603	No description available	Body
Toyota	B1603	Alternator charging failure Brand	Body

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 2

These 7-character codes are manufacturer-specific variants of B1603 and may be reported by some scan tools.

Brand	Code	Description	System
Hyundai	B160300	If B-CAN BUS OFF is detected, BCM sets DTC Brand	Body
SsangYong	B160300	EOL alignment failed azimuth - target reflection too Brand	Body

6Related codes

Browse Bxxx codes or B160xx codes.