C3428 Diagnostic Trouble Code

C3428 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 C3428 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.

Process Tips

Diagnostic trouble code C3428 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 C3428.

Fortunately, C3428 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3428 Trouble Code For Specific Cars

C3428 Holden Calais Pedal Position Out of Self Test Range
C3428 Nissan Trailrunner Cylinder #4 High To Low Side Open
C3428 Skoda 1200 Keep Alive Memory Test Failure
C3428 Suzuki Samurai Mirror Driver Horizontal Switch Circuit Short To Ground
C3428 Triumph Super Pedal Correlation PDS1 and LPDS High
C3428 Marathon Corsaire Traction Motor Encoder circuit Failure
C3428 Hyundai Entourage SCP (J1850) Invalid or Missing Data for Air Conditioning Clutch