P1446 Diagnostic Trouble Code

P1446 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 P1446 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
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

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.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

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. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code P1446 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 P1446.

Fortunately, P1446 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1446 Trouble Code For Specific Cars

P1446 Mg Montego Air Suspension Warning Lamp Circuit Failure
P1446 Bugatti Type 46 Cylinder 11 Injector Circuit Low
P1446 Lorraine Dietrich Le Mans Torque Converter Clutch Circuit Electrical
P1446 Porsche 944 Fuel Level Sensor B Circuit Low
P1446 Minerva Aks Anti Theft Input Signal Circuit Short To Battery
P1446 Ford C-max Ii Low A/C Cycling Period
P1446 Peugeot Tepee Engine Oil Pressure Sensor/Switch Low Voltage