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 Isuzu Vx
P1446 Chevrolet Prisma EIC Switch-1 Assembly Circuit Failure
P1446 Puma Gte Fuel Temperature Sensor #2 Circuit Failure
P1446 Mini 1275 Anti-Theft Number of Programmed Keys Is Below Minimum
P1446 Packard Twelve Driver Door Handle Circuit Short To Battery
P1446 Kia Forte Ii Seat Switch Reference Voltage Positive Common Open Circuit
P1446 Mercedes Glc Accelerometer Rear Circuit Short To Ground