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 Porsche 1300 Front Echo Sensor Circuit Failure
P049E Acura Arta ABS Hydraulic Pressure Differential Switch Input Circuit Failure
P049E Autobianchi Bianchina Aux Heater Coolant Sensor Circuit Short to Ground
P049E Toyota Ist Oil Level Switch Circuit Short To Ground
P049E Peerless 33.8 Hp Drivers Seat Belt Buckle Switch Circuit Open
P049E Ferrari 488 Intake Manifold Runner Control (Bank 2) Stuck Closed
P049E Cisitalia D.2 External Charging Fault