U2673 Diagnostic Trouble Code

U2673 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 U2673 diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
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

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code U2673 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 U2673.

Fortunately, U2673 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2673 Trouble Code For Specific Cars

U2673 Citroen Light 15 Fuel Pump Driver Module Off Line
U2673 Nissan Axy Climate Control Air Temperature Internal Sensor Motor Circuit Short To Ground
U2673 Peugeot Expert Enable Signal Circuit Short to Battery
U2673 Steyr 500 Lamp Seat Belt Circuit Short To Ground
U2673 Holden Hd Power Door Memory Lock Relay Circuit Open
U2673 Wartburg Sports
U2673 Citroen Mini-zup Fuel Pump Monitor Circuit Low Input