PowertrainP2603

Caution

Severity: Caution - get it checked when you can

Coolant Pump A Control Circuit High

32 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

Safety: This code relates to engine cooling or temperature. Overheating can damage the engine.

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

Watch the temperature gauge. Stop safely and let the engine cool if the gauge climbs, steam appears, or a red warning light comes on.

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 32

Brand	Code	Description	System
Ashok Leyland CV	P2603	Coolant Pump A Control Circuit High SAE	Powertrain
BAIC Motor	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Mercedes-Benz	P2603	Coolant Pump A Control Circuit High SAE	Powertrain
BYD	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Chery	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Daewoo	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Daihatsu	P2603	Inverter water pump rotations signal Hi sticking Brand	Powertrain
DFFS	P2603	Position sensor fault Brand	Powertrain
DFFX	P2603	Coolant Pump Control Circuit High Brand	Powertrain
DFXK	P2603	Coolant Pump Control Circuit High Brand	Powertrain
EOBD	P2603	Kylvätskepump 'A' styrkrets hög Brand	Powertrain
Geely	P2603	Coolant Pump Control Circuit High Brand	Powertrain
GM	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Great Wall	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Hafei	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Holden	P2603	Auxiliary Coolant Pump Relay Control Circuit High Voltage Brand	Powertrain
Honda	P2603	Coolant Pump A Control Circuit High SAE	Powertrain
Hyundai	P2603	Coolant Pump A Control Circuit High SAE	Powertrain
Land Rover	P2603	Coolant Pump A Control Circuit High SAE	Powertrain
Maserati	P2603	Electric Coolant Pump Control Circuit High Brand	Powertrain
Opel	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Perodua	P2603	Inverter water pump rotations signal Hi sticking Brand	Powertrain
Peugeot	P2603	Coolant Pump A Control Circuit High SAE	Powertrain
Porsche	P2603	Relais Zusatzwasserpumpe - SYM0 Brand	Powertrain
Proton	P2603	Coolant Pump A Control Circuit High SAE	Powertrain
Saab	P2603	Coolant Pump Control Circuit High Brand	Powertrain
MG (SAIC)	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Smart	P2603	Coolant Pump A Control Circuit High SAE	Powertrain
Sprinter	P2603	Coolant Pump A Control Circuit High SAE	Powertrain
Tata	P2603	Coolant Pump Control Circuit High Brand	Powertrain
Toyota	P2603	Position sensor fault Brand	Powertrain
Volkswagen	P2603	Coolant pump control circuit: short to plus; Defective 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 4

These 7-character codes are manufacturer-specific variants of P2603 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P260300	Der Ausgang für Umwälzpumpe 'Kühlmittel' hat Kurzschluss nach Plus. Brand	Powertrain
Sprinter	P260300	No description available	Powertrain
SsangYong	P260300	Abnormal speed sensor supply voltage Brand	Powertrain
Mercedes-Benz	P260312	Der Ausgang für Umwälzpumpe 'Kühlmittel' hat Kurzschluss nach Plus. Es liegt ein Kurzschluss nach Plus vor. Brand	Powertrain

6Related codes

Browse Pxxx codes or P260xx codes.