P258D Diagnostic Trouble Code

P258D 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 P258D diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code P258D 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 P258D.

Fortunately, P258D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P258D Trouble Code For Specific Cars

P258D Jeep Cj2 Seat Driver Rear Down Switch Circuit Short To Battery
P258D Chrysler Sedan Exhaust Gas Recirculation Flow Malfunction
P258D Chrysler Neon Evaporative Emission Control System Vent Control Circuit Malfunction
P258D Secma F16 Insufficient Coolant Temperature for Closed Loop Fuel Control
P258D Ford Fusion (us) Mirror Driver Horizontal Switch Circuit Failure
P258D Monteverdi 400 Battery Power Relay Circuit Open
P258D Austin Maestro Autolamp Sensor Input Circuit Short To Battery