P0741 Diagnostic Trouble Code

P0741 is a kind of OBD-II Diagnostic P-Powertrain 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 P0741 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
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. 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. 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 P0741 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 P0741.

Fortunately, P0741 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0741 Trouble Code For Specific Cars

P0741 Volvo S60 SCP (J1850) Invalid or Missing Data for Experimental #1
P0741 Steyr 126 Lamp Seat Belt Circuit Failure
P0741 Peugeot 305 EGI Temperature Sensor Failure
P0741 Volkswagen Kombi Right Power Sliding Door Open/Close Output Circuit Short to Battery
P0741 Buick Lucerne Cylinder 8 Misfire Detected
P0741 Revere M HO2S Insufficient Switching Sensor 1
P0741 Mazda Bt50 Transmission Transfer Case Differential Lock-Up Feedback Switch Short Circuit To Ground