B143B Diagnostic Trouble Code

B143B 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 B143B diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code B143B 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 B143B.

Fortunately, B143B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B143B Trouble Code For Specific Cars

B143B Thames 60 Module Supply Voltage Out Of Range
B143B Mitsubishi Space Runner Aux Heater Overheat Sensor Circuit Short to Ground
B143B Tornado Thunderbolt Motor Relay # 1 Circuit Failure
B143B Laraki Fulgura System Power Relay Circuit Short to Battery
B143B Vernon-derby Vernon-derby
B143B Amc Eagle Air Suspension Front Height Sensor High (SE) Signal Circuit Short To Ground
B143B Jiotto Caspita Seat Front Up/Down Potentiometer Feedback Circuit Short To Battery