PowertrainP1604

Caution

Severity: Caution - get it checked when you can

Control unit faulty

35 brands affected · Description from BMW data.

Key terms: Control module: a small computer that runs one part of the car · Powertrain: engine, transmission and emissions

1What it means in plain English

The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.

2Common causes

Sensor or actuator fault
Wiring or connector fault
Vacuum or intake leak
Fuel or ignition problem
Control module fault

3Can I drive?

Caution · drive with care

Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.

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 35

Brand	Code	Description	System
Ashok Leyland CV	P1604	Particulate Filter. Pressure Sensor. Sensor 1. Operation Failure Brand	Powertrain
BAIC Motor	P1604	Memory fault Brand	Powertrain
Mercedes-Benz	P1604	No description available	Powertrain
BMW	P1604	Control unit faulty Brand	Powertrain
BYD	P1604	VIN not programmed Brand	Powertrain
Chery	P1604	VIN not programmed Brand	Powertrain
Daewoo	P1604	EEPROM error Brand	Powertrain
Daihatsu	P1604	Starting failure Brand	Powertrain
DFFS	P1604	ECM Random Access Memory (RAM) stack error Brand	Powertrain
DFFX	P1604	VIN not programmed Brand	Powertrain
DFXK	P1604	ECM RAM stack error Brand	Powertrain
EOBD	P1604	Startfejl Brand	Powertrain
Geely	P1604	TCUEMM Data Error Brand	Powertrain
GM	P1604	Code Word Unregestered Brand	Powertrain
Great Wall	P1604	VIN not programmed Brand	Powertrain
Hafei	P1604	VIN not programmed Brand	Powertrain
Holden	P1604	Lost Communication with Engine Control Module Brand	Powertrain
Hyundai	P1604	No description available	Powertrain
Isuzu	P1604	No description available	Powertrain
Land Rover	P1604	Code Word Unregistered Brand	Powertrain
Mahindra	P1604	No description available	Powertrain
Mitsubishi	P1604	VIN not programmed Brand	Powertrain
Opel	P1604	Code Word Unregestered Brand	Powertrain
Perodua	P1604	Starting failure Brand	Powertrain
Peugeot	P1604	No description available	Powertrain
Porsche	P1604	Communication, airbag Brand	Powertrain
Proton	P1604	VIN not programmed Brand	Powertrain
Saab	P1604	Code Word Unregestered Brand	Powertrain
MG (SAIC)	P1604	Internal Control Module Driver Error Brand	Powertrain
Sprinter	P1604	No description available	Powertrain
Subaru	P1604	set as a result of long engine cranking Brand	Powertrain
Suzuki	P1604	No description available	Powertrain
Tata	P1604	ECU Memory Integrity Fault Brand	Powertrain
Toyota	P1604	ECM Random Access Memory (RAM) stack error Brand	Powertrain
Volkswagen	P1604	Internal control module: output driver IC error; Open circuit Brand	Powertrain

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 3

These 7-character codes are manufacturer-specific variants of P1604 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P160400	The control unit is not coded Brand	Powertrain
SsangYong	P160400	TCU EMM data error Brand	Powertrain
Mercedes-Benz	P160451	The control unit is not coded. Not Programmed Brand	Powertrain

6Related codes

Browse Pxxx codes or P160xx codes.