P1320 Diagnostic Trouble Code

P1320 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 P1320 diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
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
Fuel with a large percentage of sulfur will clog the DPF quickly

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. 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.

Process Tips

Diagnostic trouble code P1320 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 P1320.

Fortunately, P1320 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1320 Trouble Code For Specific Cars

P1320 Mazda B2300 Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Battery
P1320 Brutsch Bussard Cruise Control On Signal Malfunction
P1320 Tvr 390 Power Door Lock Circuit Failure
P1320 Noble M12 Cylinder 10 Contribution/balance Fault
P1320 Citroen C4 Cactus FTS Low - Fuel Pump Temperature Sensor Low
P1320 Panther J72 Driver Sid, Side crash sensor mount fault
P1320 Studebaker Commander Lamp Turn Signal Rear Output Circuit Short To Battery