B140D Diagnostic Trouble Code

B140D is a kind of OBD-II Diagnostic B-Body 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 B140D diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
Misfire

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. 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.

Process Tips

Diagnostic trouble code B140D 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 B140D.

Fortunately, B140D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B140D Trouble Code For Specific Cars

B140D Panoz Aiv Roadster Driver Power Window Up Circuit Short To Battery
B140D Suzuki Celerio Memory Off Switch Circuit Short to Battery
B140D Alfa Romeo 145 ABS Outlet Valve Coil RF Circuit Open
B140D Salmson 2300 Illuminated Entry Input Open Circuit
B140D Fiat 35 Hp Lamp Air Bag Warning Indicator Circuit Failure
B140D Daihatsu Compagno Gear Shift Lock Solenoid Circuit Range/Performance
B140D Porsche 986 Fuel level Sensor Circuit Low Input