P284D Diagnostic Trouble Code

P284D 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 P284D diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. 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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code P284D 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 P284D.

Fortunately, P284D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P284D Trouble Code For Specific Cars

P284D Trident Clipper Passenger Side Crash Sensor Internal Fault
P284D Rolls-royce 20 Hydraulic Pressure Unit Cycling Period Too Short
P284D Mitsubishi Pajero Aux Heater Cool Down Time Exceeded (may be con to a453-5 )
P284D Opel Agila B Damper RF Circuit Short to Ground
P284D Daewoo Mantica Gate Select Position Circuit Low
P284D Daimler Limousine Heated Backlite Input Circuit Short To Battery
P284D Albion 8 ABS Outlet Valve Coil Rear Circuit Short To Battery