C0665 Diagnostic Trouble Code

C0665 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 C0665 diagnostic trouble code may include:

If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Corroded or damaged connector
Reduction in engine performance, especially at low RPM levels
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Some aftermarket accessories and performance modifications

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look at the plug wires to make sure they are not burnt or laying on the exhaust. 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 C0665 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 C0665.

Fortunately, C0665 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0665 Trouble Code For Specific Cars

C0665 Mg K3 Air Suspension RR Height Sensor Circuit Open
C0665 Morgan Model Brake Fluid Level Sensor Input Open Circuit
C0665 Daihatsu Terios 2 Glow Plug/Heater Indicator Circuit Malfunction
C0665 Lancia Gamma Speed Wheel Sensor RF Circuit Open
C0665 Mercedes-benz B Class Air Bypass Valve System
C0665 Opel Frontera Dim Panel Decrease Input Circuit Short To Ground
C0665 Fiat 147 Lack Of HO2S Switch - Sensor Indicates Lean