C1409 Diagnostic Trouble Code

C1409 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 C1409 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
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
Some aftermarket accessories and performance modifications

Repair Processes :

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. 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 C1409 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 C1409.

Fortunately, C1409 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1409 Trouble Code For Specific Cars

C1409 Renault 4 Gear Lever Push - Pull Switch (Shift Anticipate)
C1409 Avanti Studebaker Aux Heater Overheat Fault
C1409 Saturn Outlook Immobilizer/ECM Communication Error
C1409 Chevrolet Niva EGR Calibration High
C1409 Bmw 118 Calibration Resistor Out Of Range
C1409 Lancia Gamma Speed Wheel Sensor RF Circuit Open
C1409 Ferrari 225 Injector High Sides Shorted Together