B3104 Diagnostic Trouble Code

B3104 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 B3104 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
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.
Faulty IMRC actuator/sensor

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 the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code B3104 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 B3104.

Fortunately, B3104 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3104 Trouble Code For Specific Cars

B3104 Fiat 500x Lamp Anti-Theft Indicator Circuit Failure
B3104 Melkus Rs1000 A/C Request Signal Circuit Short to Ground
B3104 Alfa Romeo Alfasud Accelerometer Rear Circuit Signal Is Not Sensed
B3104 Ford Explorer Memory 2 Switch Circuit Failure
B3104 Holden Belmont Pedal Position Forward Switch Circuit Short to Battery
B3104 Nissan Xvl Cylinder #8 High To Low Side Short
B3104 Mazda Carol Transmission Transfer Case Differential Lock-Up Solenoid Open Circuit