P2728 Diagnostic Trouble Code

P2728 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 P2728 diagnostic trouble code may include:

Faulty PCM
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Poor acceleration
Hesitation upon acceleration

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look at the plug wires to make sure they are not burnt or laying on the exhaust. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code P2728 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 P2728.

Fortunately, P2728 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2728 Trouble Code For Specific Cars

P2728 Hyundai Sante
P2728 Lotus Elise S3 Traction Control Input Signal
P2728 Laraki Fulgura System Power Relay Circuit Short to Battery
P2728 Toyota Soluna Parklamp Output Relay Dirver Short to Battery
P2728 De Lorean Dmc HO2S Transition Time Ratio Sensor 1
P2728 Peugeot 604 ELC System Closure Valve Flow Fault
P2728 Abarth Otr 1000 A/C Post Heater Sensor Circuit Failure