U1831 Diagnostic Trouble Code

U1831 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 U1831 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
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
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. 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 U1831 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 U1831.

Fortunately, U1831 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U1831 Trouble Code For Specific Cars

U1831 Volvo S80
U1831 Volkswagen Transporter
U1831 Saturn Sports Inertia Switch Activated
U1831 Porsche 910 Front Wiper Select Switch "H" Short to Ground
U1831 Mercedes Glk Accelerometer Sensor Circuit Failure
U1831 Packard Cavalier Drive Switch Input Circuit Low
U1831 Honda Argento Pressure Control Solenoid C Control Circuit Low