U1018 Diagnostic Trouble Code

U1018 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 U1018 diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
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.
Faulty IMRC actuator/sensor

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code U1018 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 U1018.

Fortunately, U1018 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U1018 Trouble Code For Specific Cars

U1018 Chevrolet Camaro Driver Power Window Motor Circuit Failure
U1018 Buick Lacrosse Cylinder 8 Injector Circuit High
U1018 De Tomaso Pantera Hydraulic Fluid Pressure/ Flow Circuit Failure
U1018 Citroen Jumper Ii Fuel Pulse In Range But Higher Than Expected
U1018 Hyundai I20
U1018 Opel Lotus Door Ajar Circuit Failure
U1018 Amc Jeep Air Suspension Front Pneumatic Failure