C0477 Diagnostic Trouble Code

C0477 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 C0477 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

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. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code C0477 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 C0477.

Fortunately, C0477 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0477 Trouble Code For Specific Cars

C0477 Lutzmann Lutzmann Traction Control Valve LF Circuit Open
C0477 Suzuki Sea Forenza Mirror Driver Left Circuit Short To Battery
C0477 Mercedes B Class ABS Hydraulic Pump Motor Circuit Open
C0477 Renault 45 Hp Gear Lever X Position Circuit
C0477 Austin 8 Autolamp Delay Circuit Short To Ground
C0477 Honda Model Purge Valve Stuck Open
C0477 Renault Initiale Glow Plug Monitor Fault (Bank #1)