B3125 Diagnostic Trouble Code

B3125 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 B3125 diagnostic trouble code may include:

Carbon Buildup on O2 Sensor
Malfunction Indicator Lamp (MIL) illuminated
Hesitation upon acceleration
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.
Some aftermarket accessories and performance modifications

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. Look at the plug wires to make sure they are not burnt or laying on the exhaust. 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 B3125 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 B3125.

Fortunately, B3125 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3125 Trouble Code For Specific Cars

B3125 Daewoo Matiz Gate Select Position Circuit Range/Performance
B3125 Citroen Light 15 Fuel Pump Driver Module Off Line
B3125 Opel Frontera Dim Panel Decrease Input Circuit Short To Ground
B3125 Alfa Romeo Rz Air Bag Crash Sensor #2 Feed/Return Circuit Failure
B3125 Bmw 5 Chime Input Request Circuit Failure
B3125 Fiat Siena Led #1 Circuit Failure
B3125 Dkw F89 Idle Control System RPM lower Than Expected