U0044 Diagnostic Trouble Code

U0044 is a kind of OBD-II Diagnostic U-Network Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a U0044 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
Some aftermarket accessories and performance modifications

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code U0044 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before U0044.

Fortunately, U0044 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0044 Trouble Code For Specific Cars

U0044 Renault 26.8 Gear Control Malfunction
U0044 Vauxhall Viscount Pressure Control Solenoid Performance or Stuck Off
U0044 Chevrolet Malibu
U0044 Monteverdi 400 Battery Power Relay Circuit Open
U0044 Jaguar Xe Seat Driver Front Up Circuit Failure
U0044 Ford Territory Mirror Passenger Vertical Switch Circuit Open
U0044 Bentley Continental Gt Battery Power Supply ECU Circuit Short To Ground