P105B Diagnostic Trouble Code

P105B 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 P105B diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
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
Faulty IMRC actuator/sensor

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 P105B 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 P105B.

Fortunately, P105B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P105B Trouble Code For Specific Cars

P105B Reliant Se7 Gate Select Position Circuit Intermittent
P105B Land Rover Discovery 2 Steering Column Switch Circuit Short to Battery
P105B Hsv Senator Ride Control RR Shock Actuator Circuit Open
P105B Triumph Super Pedal Correlation PDS1 and LPDS High
P105B Hyundai Santa Fe SCP (J1850) Invalid or Missing Data for Digital Signal Processing
P105B Monteverdi High Speed Battery Power Supply ECU Circuit Failure
P105B Reliant Gtc Gate Select Actuator Circuit / Open [left / right motion]