U0134 Diagnostic Trouble Code

U0134 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 U0134 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 :

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.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

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. 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 U0134 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 U0134.

Fortunately, U0134 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0134 Trouble Code For Specific Cars

U0134 De Tomaso Mangusta Hydraulic Clutch Actuator Valve Circuit Failure
U0134 Caterham 275s-sv Door Ajar LR Circuit Short To Battery
U0134 Delahaye Type Hydraulic Pressure Unit
U0134 Fiat Barchetta Lamp Headlamp High-Beam Circuit Short To Battery
U0134 Honda J-vx
U0134 Caterham Super 7 Door Handle Right Front Circuit Open
U0134 Zotye Z10hy7d Seat Belt Switch Circuit Short To Battery