P104D Diagnostic Trouble Code

P104D is a kind of OBD-II Diagnostic P-Powertrain 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 P104D diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
Hesitation upon acceleration

Possible Causes :

A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Dirty air cleaner element Damaged DPF
Faulty IMRC actuator relay (if equipped)

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P104D 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 P104D.

Fortunately, P104D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P104D Trouble Code For Specific Cars

P104D Metropolitan 1200 Air Suspension RF Height Sensor Circuit Short To Battery
P104D Ds Ds 3 Ignition Tamper Circuit Short To Ground
P104D Mg J4 Air Suspension RR Height Sensor Circuit Failure
P104D Frisky Friskysprint O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
P104D Durkopp 40 Hp Immobilizer/ECM Communication Error
P104D Cadillac Park Avenue Dim Panel Increase Input Circuit Failure
P104D Kia Venga Servo Motor Coolair Bypass Circuit Failure