U0194 Diagnostic Trouble Code

U0194 is a kind of OBD-II Diagnostic U-Network 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 U0194 diagnostic trouble code may include:

Faulty PCM
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Poor acceleration
Hesitation upon acceleration

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

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. 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.

Process Tips

Diagnostic trouble code U0194 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 U0194.

Fortunately, U0194 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0194 Trouble Code For Specific Cars

U0194 Lotec Testa Torque Converter Clutch Circuit Malfunction
U0194 Peugeot 907 Electrodrive Fan 2 Operational Failure (Passenger Side)
U0194 Hyundai Entourage SCP (J1850) Invalid or Missing Data for Air Conditioning Clutch
U0194 Mg J2 Air Suspension RR Corner Up Timeout
U0194 Simca Vedette Beaulieu Intermediate Speed Sensor (ISS) Malfunction
U0194 Russo-baltique Impression Ignition Run Circuit Open
U0194 Denzel Sport Hydraulic Pump Relay Circuit / Open