U2016 Diagnostic Trouble Code

U2016 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 U2016 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.
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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. 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.

Process Tips

Diagnostic trouble code U2016 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 U2016.

Fortunately, U2016 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2016 Trouble Code For Specific Cars

U2016 Renault Le Car Hazard Flash Output Circuit Short Battery
U2016 Zaz Slavuta
U2016 Buick Model B-g Cylinder 9 Injector Circuit High
U2016 Talbot Lago Mirror Passenger Horizontal Switch Circuit Short To Battery
U2016 Hyundai Accent RPM Input Circuit Failure
U2016 Maserati 150 Transmission Automatic 4-Wheel Drive Indicator (Lamp) Circuit Failure
U2016 Lancia Voyager Starter Motor Circuit Failure