C1473 Diagnostic Trouble Code

C1473 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 C1473 diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
An air leak forward of the DPF will change the sensor readings resulting in the code

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. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code C1473 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 C1473.

Fortunately, C1473 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1473 Trouble Code For Specific Cars

C1473 Vauxhall Vectra B Pressure Control Solenoid C Performance or Stuck off
C1473 Kia Spectra Sensor Power Supply Low Input
C1473 Simca 11 Intake Manifold Runner Control (Bank 1) Stuck Open
C1473 Oakland 6 Cylinder 2 Injector Circuit Low
C1473 Honda Acura Rsx Pressure Control Solenoid B Stuck On
C1473 Victoria Spatz Purge flow Sensor Circuit Range/Performance
C1473 Hispano Suiza H6 Pedal Correlation PDS2 and LPDS High