PowertrainP0641

Serious

Severity: Serious - have it checked soon

Sensor Reference Voltage A Circuit/Open

42 brands affected · Generic SAE J2012 description.

Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

The engine computer or one of its output circuits has a fault.

2Common causes

Engine control module fault
Power or ground connection problem
Low battery or charging voltage
Wiring short or open circuit
Software or memory fault

3Can I drive?

Serious · drive with care

If the engine runs normally, drive carefully to a workshop for diagnosis. If it runs badly, stalls, or will not restart, have the car towed.

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 42

Brand	Code	Description	System
Ashok Leyland CV	P0641	Sensor 2 Accelerator Pedal Position. The Supply Voltage Is Too High Brand	Powertrain
BAIC Motor	P0641	Pressure sensor supply fault Brand	Powertrain
Mercedes-Benz	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
BYD	P0641	Pressure sensor supply fault Brand	Powertrain
Chery	P0641	Sensor power supply 1 Brand	Powertrain
Chrysler	P0641	sensor reference voltage 1 circuit Brand	Powertrain
Daewoo	P0641	5V reference circuit 1 low voltage Brand	Powertrain
Daihatsu	P0641	Sensor reference voltage A circuit/open Brand	Powertrain
DFFS	P0641	Sensor guidance circuit open Brand	Powertrain
DFFX	P0641	Reference voltage A amplitude fault Brand	Powertrain
DFXK	P0641	ETC reference voltage A#range fault Brand	Powertrain
EOBD	P0641	Anduri viitepinge 'A' vooluring/lõik Brand	Powertrain
Ford	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Geely	P0641	Pressure Sensor Power Failed Brand	Powertrain
GM	P0641	5 volt reference 1 circuit Brand	Powertrain
Great Wall	P0641	Pressure sensor supply fault Brand	Powertrain
Hafei	P0641	Sensor Reference Voltage A Circuit/Open Brand	Powertrain
Holden	P0641	Sensor Reference Voltage Circuit Brand	Powertrain
Honda	P0641	If DTC P1625 is stored at the same timeas DTC,troubleshoot DTC 1625 Brand	Powertrain
Hyundai	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Isuzu	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Land Rover	P0641	Transmission sensor supply voltage too high or too low Brand	Powertrain
Mahindra	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Maserati	P0641	Sensor Reference Voltage 1 Circuit Brand	Powertrain
Mazda	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Mitsubishi	P0641	Sensor reference voltage1 Brand	Powertrain
Nissan	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Opel	P0641	5 volt reference 1 circuit Brand	Powertrain
Perodua	P0641	Sensor reference voltage A circuit/open Brand	Powertrain
Peugeot	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Porsche	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Proton	P0641	Sensor reference voltage1 Brand	Powertrain
Saab	P0641	5 Volt Reference 1 Circuit Brand	Powertrain
MG (SAIC)	P0641	Sensor Supply Voltage Brand	Powertrain
Smart	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Sprinter	P0641	Sensor Reference Voltage A Circuit/Open SAE	Powertrain
Suzuki	P0641	Sensor Reference Voltage 'A' Circuit / Open Brand	Powertrain
SWM Motor	P0641	Reference voltage A amplitude fault Brand	Powertrain
Tata	P0641	Supply For Sensor 1 Brand	Powertrain
Toyota	P0641	Electronic Throttle Control (ETC) reference voltage A amplitude fault Brand	Powertrain
Volvo	P0641	Sensor Power Supply Brand	Powertrain
Volkswagen	P0641	Sensor reference voltage A: open circuit; 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 12

These 7-character codes are manufacturer-specific variants of P0641 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P064100	Sensor Reference Voltage 'A' Circuit/Open Brand	Powertrain
SsangYong	P064100	Reference Voltage Sensor Open Circuit Brand	Powertrain
Volkswagen	P064100	Sensor reference voltage A open circuit Brand	Powertrain
Mercedes-Benz	P064104	Der Ausgang 1 für Referenzspannung der Sensoren hat einen elektrischen Fehler oder Unterbrechung. Es liegt ein interner Fehler vor. Brand	Powertrain
Mercedes-Benz	P064111	Der Ausgang 1 für Referenzspannung der Sensoren hat einen elektrischen Fehler oder Unterbrechung. Es liegt ein Kurzschluss nach Masse vor. Brand	Powertrain
Mercedes-Benz	P064116	Der Ausgang 1 für Referenzspannung der Sensoren hat einen elektrischen Fehler oder Unterbrechung. Der Grenzwert für elektrische Spannung ist unterschritten. Brand	Powertrain
Mercedes-Benz	P064117	Sensor Reference Voltage 'A' Circuit/Open Brand	Powertrain
Mercedes-Benz	P06411C	Output 1 for the reference voltage of the sensors has an electrical fault or an open circuit. Circuit Voltage Out of Range. Brand	Powertrain
Mercedes-Benz	P064164	Output 1 for the reference voltage of the sensors has an electrical fault or an open circuit - There is an implausible signal. Brand	Powertrain
Mercedes-Benz	P064198	Der Ausgang 1 für Referenzspannung der Sensoren hat einen elektrischen Fehler oder Unterbrechung. Die Komponente oder das System hat Übertemperatur. Brand	Powertrain
Mercedes-Benz	P0641A2	Output 1 for the reference voltage of the sensors has an electrical fault or an open circuit. The system voltage is too low Brand	Powertrain
Mercedes-Benz	P0641A3	Output 1 for the reference voltage of the sensors has an electrical fault or an open circuit. The system voltage is too high Brand	Powertrain

6Related codes

Browse Pxxx codes or P064xx codes.