U3185 Diagnostic Trouble Code

U3185 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 U3185 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. 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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code U3185 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 U3185.

Fortunately, U3185 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U3185 Trouble Code For Specific Cars

U3185 Peugeot 202 ECM Control Relay O/P Circuit Malfunction
U3185 Tchaika Tchaika Mirror Switch Reference Voltage Positive Common Supply Voltage Fault
U3185 Citroen Big Fifteen Front Doppler Sensor Circuit Failure
U3185 Ducati Monster 821 Illuminated Entry Input Short Circuit To Ground
U3185 B Engineering Edonis B Camshaft Position - Actuator Circuit (Bank 2)
U3185 Oldsmobile Six Damper LF Circuit Short To Battery
U3185 Triumph Spitfire PCM Processor Fault