C0093 Diagnostic Trouble Code

C0093 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 C0093 diagnostic trouble code may include:

Faulty PCM
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Poor acceleration
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
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code C0093 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 C0093.

Fortunately, C0093 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0093 Trouble Code For Specific Cars

C0093 Bertone Birusa Brake Motor Warning lamp Circuit Failure
C0093 Pontiac Montana Fan Relay (High) Circuit Malfunction
C0093 Mazda Ms-9 (CAN) Lack of Acknowledgement From Engine Management
C0093 Maserati Gransport Transmission Fluid Pressure Sensor/Switch D Circuit Intermittent
C0093 Singer 9 Internal Voltage Regulator Malfunction
C0093 Kia Sedona Secondary Air Injection System Switching Valve A Circuit Open
C0093 Holden Jd Power Steering Failure