P307C Diagnostic Trouble Code

P307C 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 P307C diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code P307C 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 P307C.

Fortunately, P307C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P307C Trouble Code For Specific Cars

P307C Checker Aerocar Door Passenger Key Cylinder Switch Failure
P307C Mercedes-benz S Class Air Suspension Front Height Sensor High (SE) Signal Circuit Short To Ground
P307C Bizzarrini Manta Brake Switch Out Of Self Test Range
P307C Invicta 12
P307C Simca 8 Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)
P307C Chadwick Six Door Handle Switch Circuit Short To Ground
P307C Daihatsu Altis Gear Shift Foward Actuator Circuit High