P093B Diagnostic Trouble Code

P093B 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 P093B diagnostic trouble code may include:

If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Corroded or damaged connector
Reduction in engine performance, especially at low RPM levels
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on 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.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code P093B 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 P093B.

Fortunately, P093B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P093B Trouble Code For Specific Cars

P093B Simca Horizon Interior Fan Control Circuit Short to Ground
P093B Pininfarina Start Evaporative Emission (EVAP) System Flow During Non-Purge Chevrolet Only
P093B Allard Safari Air Bag Driver Inflator Circuit Resistance Low on Squib - Loop #2
P093B Panhard Pl Driver Power Window Up Circuit Open
P093B Ford Orion Mirror Passenger Down Circuit Short To Battery
P093B Marcos Lm Transmission 4WD Mode Select Return Input Circuit Failure
P093B Ford Mustang Mirror Driver/Passenger Switch Circuit Short To Battery