C2416 Diagnostic Trouble Code

C2416 is a kind of OBD-II Diagnostic C-Chassis 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 C2416 diagnostic trouble code may include:

Faulty or damaged wiring
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
Poor fuel economy
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

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. 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. 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.

Process Tips

Diagnostic trouble code C2416 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 C2416.

Fortunately, C2416 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2416 Trouble Code For Specific Cars

C2416 Pontiac Lemans Fan Control Circuit Malfunction
C2416 Dodge Hemi Ignition Control (IC) Circuit Low Voltage
C2416 Lotus Carlton Torque Converter/Brake Switch B Circuit Malfunction
C2416 Skoda Popular Knock Sensor 2 Circuit Malfunction (Bank 2)
C2416 Daihatsu Domino Gear Shift Position Circuit Intermittent
C2416 Opel Astra K Decklid Ajar Rear Door Circuit Open
C2416 Subaru Traviq Loss of KAM Power; Open Circuit