U011D Diagnostic Trouble Code

U011D 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 U011D 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 :

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)
Faulty IMRC actuator relay (if equipped)

Repair Processes :

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. 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 U011D 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 U011D.

Fortunately, U011D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U011D Trouble Code For Specific Cars

U011D Subaru Ff-1 Left Front Sensor Circuit Fault
U011D Porsche 907 Front Wiper Select Switch "B" Short to Ground
U011D Franklin Series 17 No Communication to VICS Module (No Fitting of VICS)
U011D Suzuki Sx4 Mirror Driver Switch Assembly Circuit Open
U011D Stearns Knight B Lamp Park Input Circuit Short To Battery
U011D Armstrong Siddeley Special Air Suspension Rear Height Sensor High (SE) Signal Circuit Short To Ground
U011D Hyundai Equus SCP (J1850) Invalid or Missing Data for Antenna