U3608 Diagnostic Trouble Code

U3608 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 U3608 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
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
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. 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 U3608 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 U3608.

Fortunately, U3608 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U3608 Trouble Code For Specific Cars

U3608 Chevrolet Ssr Electrodrive Fan 2 Operational Failure (Passenger Side)
U3608 Oakland 6 Cylinder 2 Injector Circuit Low
U3608 Acura Mdx ABS Hydraulic Pump Motor Circuit Short To Ground
U3608 Lotus 79 Torque Converter/Brake Switch B Circuit Low
U3608 Riley 4 Hood Switch Circuit Short To Ground
U3608 Thames 60 Module Supply Voltage Out Of Range
U3608 Mercedes-benz Cl Class Air Pressure Low Circuit Short to Gnd