P243F Diagnostic Trouble Code

P243F 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 P243F diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

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.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. 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 P243F 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 P243F.

Fortunately, P243F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P243F Trouble Code For Specific Cars

P243F Chevrolet Optra EGRA Circuit Malfunction
P243F Koenigsegg Ccxr Servo Motor Potentiometer Coolair Circuit Short To Ground
P243F Opel Meriva Door Ajar Circuit Short To Battery
P243F Renault 5 Gear Lever X Position Circuit Intermittent
P243F Nag Voran Camshaft Position Sensor Circuit Low Input
P243F Dodge Nitro Ignition Run Circuit Open
P243F Chevrolet Trailblazer 2 Enable Signal Circuit Short to Battery