U013U Diagnostic Trouble Code

U013U 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 U013U diagnostic trouble code may include:

Faulty PCM
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Poor acceleration
Hesitation upon acceleration

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code U013U 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 U013U.

Fortunately, U013U is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U013U Trouble Code For Specific Cars

U013U Mercury Colony Air Suspension LR Air Compress Request Exceeded Max Timing
U013U Porsche 935 Fuel Level Input Circuit Low
U013U Nissan Prairie COURTESY LAMP OUTPUT Ckt Short to Battery
U013U Mazda Mazdaspeed Turbocharger Boost Sensor A Circuit Range/Performance
U013U Nissan Aa-x Climate Control A/C Post Evaporator Sensor Circuit Short To Ground
U013U Volvo P210
U013U Mitsubishi Starion B Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)