U1731 Diagnostic Trouble Code

U1731 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 U1731 diagnostic trouble code may include:

Carbon Buildup on O2 Sensor
Malfunction Indicator Lamp (MIL) illuminated
Hesitation upon acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Some aftermarket accessories and performance modifications

Repair Processes :

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. Look at the plug wires to make sure they are not burnt or laying on the exhaust. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code U1731 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 U1731.

Fortunately, U1731 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U1731 Trouble Code For Specific Cars

U1731 Morris 1100 Brake Pedal Input Circuit Battery Short
U1731 Ferrari 550 Intake Manifold Runner Control (Stuck Open)
U1731 Chrysler Ccv Engine Overtemp Condition
U1731 Suzuki Wagon Mirror Driver Up/Down Motor Stalled
U1731 Adler 10 ABS Inlet Valve Coil RF Circuit Short To Battery
U1731 Holden Lh Power Steering Pressure Sensor Circuit Low Input
U1731 Beijing Bj 212 B+ Supply To VCRM Fan Circuit Malfunction