U0059 Diagnostic Trouble Code

U0059 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 U0059 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on 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.
Faulty IMRC actuator relay (if equipped)

Repair Processes :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.

Process Tips

Diagnostic trouble code U0059 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 U0059.

Fortunately, U0059 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0059 Trouble Code For Specific Cars

U0059 Acura Tl ABS Inlet Valve Coil LR Circuit Short To Battery
U0059 Sunbeam-talbot 90 Mass or Volume Air flow Circuit Range/Performance Problem
U0059 Volkswagen Jetta Right Front Center Sensor Circuit Short to Vbat
U0059 Lamborghini Marzal Solar Radiation Sensor Circuit Failure
U0059 Italdesign Medici SCP (J1850) Lack of Acknowledgment for Mirrors
U0059 Wolseley 6
U0059 Vauxhall Carlton