P1996 Diagnostic Trouble Code

P1996 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 P1996 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
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
Dirty air cleaner element Damaged DPF

Repair Processes :

Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. 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. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code P1996 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 P1996.

Fortunately, P1996 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1996 Trouble Code For Specific Cars

P1996 Toyota Tacoma Passenger Door Unlock Switch Circuit Shorted to Ground
P1996 Hyundai Tucson Iii
P1996 Simca 8 Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)
P1996 Subaru Outback 3 LF LAMP LOW BEAM CIRCUIT Short to Battery
P1996 Gaz 28 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
P1996 Alvis 4.3 Litre Air Bag Safing Sensor Output Circuit Short To Battery
P1996 Renault Grand Espace Glow Plug Circuit High Side, High Input