PowertrainP0251

Caution

Severity: Caution - get it checked when you can

Injection Pump Fuel Metering Control A (Cam/Rotor/Injector)

29 brands affected · Generic SAE J2012 description.

Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This code is in the powertrain range that covers fuel and air metering, over-temperature, overspeed and transmission over-temperature conditions.

2Common causes

Dirty or faulty mass air flow sensor
Vacuum or intake air leak
Weak fuel pump or clogged fuel filter
Faulty fuel injector
Faulty oxygen sensor
Wiring or connector fault

3Can I drive?

Caution · drive with care

Do not assume this code is safe to ignore: some codes in this range affect engine safety systems. Have it diagnosed; if the engine is overheating, a red warning light is on, or the engine loses power or cuts out, stop safely and get professional help.

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 29

Brand	Code	Description	System
Ashok Leyland CV	P0251	Variable Effort Steering Control Module. Steering Lock. High Signal Brand	Powertrain
BAIC Motor	P0251	Injection Pump Fuel Metering Control A Brand	Powertrain
Mercedes-Benz	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) SAE	Powertrain
BMW	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) Brand	Powertrain
BYD	P0251	Flow control valve high side/low side control circuit open Brand	Powertrain
Chery	P0251	MEUN open circuit Brand	Powertrain
Chrysler	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) SAE	Powertrain
Daewoo	P0251	Injection Pump Fuel Metering Control A Brand	Powertrain
DFFS	P0251	Injection Pump Fuel Metering Control A Brand	Powertrain
DFFX	P0251	Injection Pump Fuel Metering Control A Brand	Powertrain
DFXK	P0251	Fuel capacity metering unit open circuit Brand	Powertrain
EOBD	P0251	Polttoaineen annostelun ohjaus 'A' Brand	Powertrain
Geely	P0251	Injection Pump A Rotor Cam: Malfunction Brand	Powertrain
GM	P0251	Injection pump CAM system Brand	Powertrain
Great Wall	P0251	Inlet control valve open circuit Brand	Powertrain
Hafei	P0251	Injection Pump Fuel Metering Control A Brand	Powertrain
Holden	P0251	Fuel Pressure Regulator 1 Control Circuit Brand	Powertrain
Honda	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) SAE	Powertrain
Hyundai	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) SAE	Powertrain
Isuzu	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) SAE	Powertrain
Land Rover	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) SAE	Powertrain
Maserati	P0251	Injection Pump Fuel Metering Control Circuit Open Brand	Powertrain
Opel	P0251	Injection pump CAM system Brand	Powertrain
Peugeot	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) SAE	Powertrain
Saab	P0251	Injection Pump CAM System Brand	Powertrain
MG (SAIC)	P0251	Injection Pump Fuel Metering Control A Brand	Powertrain
Sprinter	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) SAE	Powertrain
Tata	P0251	IMV Drive - Short Circuit Brand	Powertrain
Toyota	P0251	Injection Pump Fuel Metering Control A (Cam/Rotor/Injector) 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 7

These 7-character codes are manufacturer-specific variants of P0251 and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	P025100	IMV driver circuit malfunction - short Brand	Powertrain
Mercedes-Benz	P025118	Der Ausgang für das Mengenregelventil hat einen elektrischen Fehler. Der Grenzwert für Strom ist unterschritten. Brand	Powertrain
Sprinter	P025118	Der Ausgang für das Mengenregelventil hat einen elektrischen Fehler. Der Grenzwert für Strom ist unterschritten. Brand	Powertrain
Mercedes-Benz	P025119	Der Ausgang für das Mengenregelventil hat einen elektrischen Fehler. Der Grenzwert für Strom ist überschritten. Brand	Powertrain
Sprinter	P025119	Der Ausgang für das Mengenregelventil hat einen elektrischen Fehler. Der Grenzwert für Strom ist überschritten. Brand	Powertrain
Mercedes-Benz	P025129	Der Ausgang für das Mengenregelventil hat einen elektrischen Fehler. Es liegt ein ungültiges Signal vor. Brand	Powertrain
Mercedes-Benz	P025185	Der Ausgang für das Mengenregelventil hat einen elektrischen Fehler. Es liegt ein Signal oberhalb des zulässigen Grenzwertes. Brand	Powertrain

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