P1951 Diagnostic Trouble Code

P1951 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 P1951 diagnostic trouble code may include:

Carbon Buildup on O2 Sensor
Malfunction Indicator Lamp (MIL) illuminated
Hesitation upon acceleration
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
Some aftermarket accessories and performance modifications

Repair Processes :

Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P1951 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 P1951.

Fortunately, P1951 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1951 Trouble Code For Specific Cars

P1951 Kia Sorento Secondary Air Injection System Switching Valve B Circuit Open
P1951 Porsche 936 Fuel Level Output Circuit Malfunction
P1951 Fiat Twelve Left Front Sensor Circuit Short to Vbat
P1951 Jensen Interceptor Seat Driver Recline Rearward Switch Circuit Failure
P1951 Fiat Grande Punto Lamp Turn Signal Front Output Circuit Failure
P1951 Mg Ya Ambient Air Temperature Sensor Circuit Intermittent
P1951 Datsun Bluebird HO2S Heater Control Circuit (Bank 1 Sensor 1)