B3124 Diagnostic Trouble Code

B3124 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 B3124 diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. 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 B3124 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 B3124.

Fortunately, B3124 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3124 Trouble Code For Specific Cars

B3124 Chevrolet Uplander Engine Coolant Level Switch Circuit Short to Ground
B3124 Peugeot 308 EGR Calibration Low
B3124 Nissan Interstar Coast Clutch Solenoid Circuit Malfunction
B3124 Ford Orion Mirror Passenger Down Circuit Short To Battery
B3124 Mg Rv Air Temperature External Sensor Circuit Open
B3124 Daimler 2.5-litre Gyroscope Error
B3124 Chevrolet Relsamo EIC Switch-1 Assembly Circuit Short To Battery