U2076 Diagnostic Trouble Code

U2076 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 U2076 diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. 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.

Process Tips

Diagnostic trouble code U2076 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 U2076.

Fortunately, U2076 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2076 Trouble Code For Specific Cars

U2076 Mitsubishi Space Wagon Aux Heater Start Counter Overrun/System Locked (same as below ?)
U2076 Lanchester Dauphin Speed Vehicle Signal Circuit Failure
U2076 Bentley Azure Battery Power Supply ECU Circuit Failure
U2076 Citroen Jumpy Iii Fuel Pump Control Out Of Range
U2076 Morris Mini Brake Switch Malfunction
U2076 Daihatsu Taft Glow Plug/Heater Circuit "A" Malfunction
U2076 Cadillac V16 Disable Signal Output Circuit Short to Battery