P1976 Diagnostic Trouble Code

P1976 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 P1976 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
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.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

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. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code P1976 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 P1976.

Fortunately, P1976 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1976 Trouble Code For Specific Cars

P1976 Rochet-schneider 12 Hydraulic Pressure Sensor Circuit
P1976 Toyota Rav4 Park Brake Valve Solenoid #1 Sense Input Circuit Failure
P1976 Bmw 750 Climate Control A/C Pressure Switch Circuit Short To Battery
P1976 Metallurgique 26 Air Suspension RF Height Sensor Circuit Failure
P1976 Maserati Racing Transmission Fluid Temperature Sensor Circuit Malfunction
P1976 Dkw Universal Ignition Coil - Cylinder 6 - Early Activation Fault
P1976 Triumph Italia PATS Is Disabled (Check Link Between PATS And Transponder)