U1241 Diagnostic Trouble Code

U1241 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 U1241 diagnostic trouble code may include:

The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Faulty or damaged wiring
Hesitation upon acceleration
Engine surge

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Some aftermarket accessories and performance modifications

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code U1241 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 U1241.

Fortunately, U1241 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U1241 Trouble Code For Specific Cars

U1241 Peugeot Quasar Engine Coolant Temperature Circuit Range/Performance Problem
U1241 Porsche Carrera Gt Fuel Pulse In Range But Higher Than Expected
U1241 Maserati 425 Transmission Fluid Pressure Low
U1241 Alvis Silver Eagle Air Conditioner Refrigerant Charge Loss
U1241 Ginetta G25 Oil Temperature Sensor Circuit Short To Battery
U1241 Gnome 3 Park Switch Indicates Park with Vehicle Moving
U1241 Suzuki Cervo Memory Set Switch Circuit Failure