P1949 Diagnostic Trouble Code

P1949 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 P1949 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
Engine surge

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P1949 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 P1949.

Fortunately, P1949 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1949 Trouble Code For Specific Cars

P1949 Mercedes-benz Vaneo Air Suspension Height Sensor Power Circuit Failure
P1949 Volkswagen Sedan SCAIR Solenoid Circuit Malfunction
P1949 Subaru Outback 2 LF LAMP LOW BEAM CIRCUIT Failure
P1949 Bristol 412 Crankshaft Position Camshaft Position Correlation (Bank 2 Sensor B)
P1949 Vignale 125 PWM Input Circuit Failure
P1949 Tvr 350 Power Cable For Power Sliding Door Broken
P1949 Oldsmobile Eight Cylinder 9 Contribution/Balance Fault