P2149 Diagnostic Trouble Code

P2149 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 P2149 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
Malfunction Indicator Lamp (MIL) illuminated

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator/sensor

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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code P2149 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 P2149.

Fortunately, P2149 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2149 Trouble Code For Specific Cars

P2149 Fiat Ducato Lamp Park Input Circuit Open
P2149 Italdesign Twenty Seat Belt Switch Circuit Failure
P2149 Isatis Bv
P2149 Nissan R390 Crankshaft Position Sensor A Circuit Malfunction
P2149 Briscoe Cloverleaf Cooling Fan 2 Control Circuit Malfunction
P2149 Fiat Campagnola Lamp Headlamp Low-Beam Circuit Short To Battery
P2149 Saturn Curve