C104F Diagnostic Trouble Code

C104F is a kind of OBD-II Diagnostic C-Chassis 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 C104F diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
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. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code C104F 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 C104F.

Fortunately, C104F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C104F Trouble Code For Specific Cars

C104F Mitsubishi Lancer Evo 8 Aux A/C Blower Motor Relay Circuit Short to Ground
C104F Autobleu Coupe Aux Heater Flame Sensor Circuit Short to Ground
C104F Mercedes-benz Clc Class Air Pump Circuit Malfunction/ (AIR) System Bank 1
C104F Citroen Berlingo Ii Front Crash Sensor Internal Fault
C104F Alpine A610 Air Bag Passenger Circuit Short To Battery
C104F Alfa Romeo 145 ABS Outlet Valve Coil RF Circuit Open
C104F Porsche Boxster Type 986 Fuel Pressure Regulator 1 Control Circuit Low