U012D Diagnostic Trouble Code

U012D 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 U012D diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code U012D 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 U012D.

Fortunately, U012D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U012D Trouble Code For Specific Cars

U012D Aston Martin Rapide Air Suspension Vent Solenoid Output Circuit Open
U012D American Tourist Air Suspension LF Air Spring Solenoid Output Circuit Failure
U012D Ford Maverick Mirror Driver Vertical Feedback Potentiometer Circuit Failure
U012D Chrysler Tc Exhaust Not Warm, Downstream O2 Sensor
U012D Renault Clio 2 Gear Shift Module Communication Circuit
U012D Nissan Hypermini Clutch Switch Circuit Malfunction
U012D Bmw 3000 Catalyst Damage