U1613 Diagnostic Trouble Code

U1613 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 U1613 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Diminished fuel efficiency

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.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.

Process Tips

Diagnostic trouble code U1613 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 U1613.

Fortunately, U1613 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U1613 Trouble Code For Specific Cars

U1613 Minerva 30 Anti Theft Input Signal Circuit Failure
U1613 Monteverdi 400 Battery Power Relay Circuit Open
U1613 Nissan Sentra Cruise Control Command Switch Assembly Circuit Failure
U1613 Cisitalia 850 Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 2)
U1613 Overland 38 Door Unlock Disarm Switch Circuit Short To Ground
U1613 Alpine A106 Air Bag Memory Clear Circuit Short To Battery
U1613 Peugeot Kart Engine Coolant Level Switch Circuit Short to Ground