U264D Diagnostic Trouble Code

U264D 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 U264D diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
An air leak forward of the DPF will change the sensor readings resulting in the code

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. Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code U264D 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 U264D.

Fortunately, U264D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U264D Trouble Code For Specific Cars

U264D Land Rover Discovery 2 Steering Column Switch Circuit Short to Battery
U264D Adler Diplomat ABS Outlet Valve Coil LF Circuit Short To Battery
U264D Peugeot 5008 EIC Switch-1 Assembly Circuit Short To Ground
U264D Glas 1004 Output Speed Sensor Range/Performance
U264D La Buire 10 Hp Servo Motor Potentiometer Foot Circuit Open
U264D Mazda Rx-2 A Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
U264D Mercury Montclair Air Suspension Rear Height Sensor Low Signal Circuit Failure