U0284 Diagnostic Trouble Code

U0284 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 U0284 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
Lack of power

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Some aftermarket accessories and performance modifications

Repair Processes :

Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. 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.

Process Tips

Diagnostic trouble code U0284 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 U0284.

Fortunately, U0284 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0284 Trouble Code For Specific Cars

U0284 Chrysler Wimbledon Exhaust Valve Control Solenoid C ircuit High (Bank 1)
U0284 Volkswagen Touran
U0284 Zastava 65 SCP (J1850) Invalid or Missing Data for Vehicle Motion
U0284 Sunbeam 3-litres Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
U0284 Du Pont Touring Illuminated Entry Input Open Circuit
U0284 Lagonda Rapide Shift Solenoid E Control Circuit Low
U0284 Daimler Dk Headlamp Relay Circuit Failure