U2918 Diagnostic Trouble Code

U2918 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 U2918 diagnostic trouble code may include:

Vacuum leak on the engine
Reduction in engine performance, especially at low RPM levels
Engine surge
Poor acceleration

Possible Causes :

Dirty air cleaner element Damaged DPF
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code U2918 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 U2918.

Fortunately, U2918 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2918 Trouble Code For Specific Cars

U2918 Sunbeam Imp Manifold Absolute Temperature Circuit Low Input
U2918 Simca 1307 Intake Manifold Runner Control Circuit Malfunction
U2918 Caparo T1 Door Ajar Circuit Short To Ground
U2918 Mitsubishi Galant Ix Autolamp Delay Increase Circuit Open
U2918 Fiat Freemont Lamp Tail Output Circuit Failure
U2918 Mercedes-benz B Class Air Bypass Valve System
U2918 Alvis 12 Air Bag Safing Sensor Output Circuit Failure