U0048 Diagnostic Trouble Code

U0048 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 U0048 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
Poor fuel economy

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
Faulty IMRC actuator/sensor

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. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code U0048 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 U0048.

Fortunately, U0048 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0048 Trouble Code For Specific Cars

U0048 Nissan Mm Compressor Failure
U0048 Bmw Z4 Column Tilt Feedback Potentiometer Circuit Short to Battery
U0048 Kia Ceed Seat Recline Forward/Backward Potentiometer Feedback Circuit Short To Battery
U0048 Lada 110 Servo Motor Potentiometer Vent Circuit Failure
U0048 Ferrari Ks Invalid Test - Accelerator Pedal Movement
U0048 Pontiac Pathfinder Fan Secondary High With Fan(s) Off
U0048 Acura Slx ABS Inlet Valve Coil LR Circuit Open