P0481 Diagnostic Trouble Code

P0481 is a kind of OBD-II Diagnostic P-Powertrain 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 P0481 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 :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code P0481 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 P0481.

Fortunately, P0481 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0481 Trouble Code For Specific Cars

P0481 Packard 120 Downstream Heated O2 Sensors Swapped
P0481 Hyundai Eon
P0481 Nobel 200 Cylinder 1 Injector Circuit Low
P0481 Seat Ibiza Injector Control Pressure Above Expected Level
P0481 Alfa Romeo Gt Air Assisted Injector Control Circuit or Circuit Low
P0481 Bmw Serie 4 Clutch Position Sensor Circuit Malfunction
P0481 Fiat Ulysse Left Front Vertical Accelerometer Circuit Failure