U2958 Diagnostic Trouble Code

U2958 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 U2958 diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Faulty IMRC actuator/sensor

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code U2958 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 U2958.

Fortunately, U2958 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2958 Trouble Code For Specific Cars

U2958 Abarth 750 A Camshaft Position - Timing Over-Retarded (Bank 1)
U2958 Vauxhall Meriva Pressure Control Solenoid B Control Circuit High
U2958 Dodge R-ft Ignition Run/Start Circuit Short To Battery
U2958 Delage Delage Hydraulic Oil Temperature Sensor Circuit Low Input
U2958 Fiat 3.5 Lamp Adaptive Damping Warning Circuit Failure
U2958 Oldsmobile 88 Cylinder 5 Injector Circuit Low
U2958 Sunbeam-talbot 90 Mass or Volume Air flow Circuit Range/Performance Problem