P049E Diagnostic Trouble Code

P049E 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 P049E diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Diminished fuel efficiency

Possible Causes :

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.
Defective ECU strategies or components will prevent proper regeneration
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

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. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code P049E 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 P049E.

Fortunately, P049E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P049E Trouble Code For Specific Cars

P049E Audi 75 Alternator Load Input Failed High
P049E Calthorpe 12 Door Ajar Circuit Open
P049E Dacia Sandero Fuel Temperature Sensor B Circuit High Input
P049E Koenigsegg Ccx Servo Motor Potentiometer Coolair Circuit Short To Battery
P049E Volkswagen Gx3 Ride Control RR Shock Actuator Circuit Short To Ground
P049E Studebaker Daytona Lamp Turn Signal Right Circuit Failure
P049E Toyopet Crown Motor Temperature Out of Range