U3206 Diagnostic Trouble Code

U3206 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 U3206 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code U3206 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 U3206.

Fortunately, U3206 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U3206 Trouble Code For Specific Cars

U3206 Toyota Celica O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)
U3206 Volkswagen 411 Rear Sounder Circuit Failure
U3206 Land Rover Lr3 Steering VAPS II Circuit Loop Short To Battery
U3206 Toyota Sparky Passenger Air Bag Disable Module Fault
U3206 Bugatti Type 57 Cylinder 12 Misfire Detected
U3206 Datsun 260 High Vehicle Speed Observed in Park
U3206 Holden Gts Power Door Lock Circuit Short To Ground