U0258 Diagnostic Trouble Code

U0258 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 U0258 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
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)
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

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 missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code U0258 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 U0258.

Fortunately, U0258 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0258 Trouble Code For Specific Cars

U0258 Chery A13 Door Unlock Disarm Switch Circuit Short To Ground
U0258 Honda Odyssey Rear Cargo Door Reset Switch Stuck (Short to Ground)
U0258 Kia Potentia Seatbelt Passenger Pretensioner Circuit Short to Battery
U0258 Triumph 2500 Passengers Seat Belt Buckle Switch Circuit Short to Ground
U0258 Opel Mokka Door Ajar Lamp Circuit Open
U0258 Simca Vedette Marly Internal Control Module Keep Alive Memory (KAM) Error
U0258 Holden Maloo Power Supply #1 Circuit Short to Ground