C1573 Diagnostic Trouble Code

C1573 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 C1573 diagnostic trouble code may include:

Possible spark knock (detonation / pre-ignition)
Poor fuel economy
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
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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.

Process Tips

Diagnostic trouble code C1573 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 C1573.

Fortunately, C1573 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1573 Trouble Code For Specific Cars

C1573 Alfa 24 ABS Outlet Valve Coil Rear Circuit Short To Ground
C1573 Bmw 420 Child Seat Detection Circuit Short to Ground
C1573 Panther Solo Driver Side Airbag Fault
C1573 Mazda Cx-5 Transmission Transfer Case Front Shaft Speed Sensor Circuit Failure
C1573 Lada 2123 Shift Solenoid A Performance or Stuck Off/1-2 Shift Solenoid Valve Performance
C1573 Fiat 750 Lamp Dome Input Circuit Open
C1573 Aston Martin Virage Air Temperature External Sensor Circuit Open