C0706 Diagnostic Trouble Code

C0706 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 C0706 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
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

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C0706 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 C0706.

Fortunately, C0706 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0706 Trouble Code For Specific Cars

C0706 Ford Desert Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
C0706 De Soto Powermaster Horn Relay Coil Circuit Failure
C0706 Lancia Ionos Speed Wheel Sensor RF Input Short Circuit To Battery
C0706 Ferrari F399 Internal Control Module Keep Alive Memory (KAM) Error
C0706 Mercury Grand Marquis Air Suspension LR Corner Up Timeout
C0706 Mercedes Slk 300 Air Bag Diagnostic Monitor Ground Circuit Short To Ground
C0706 Chrysler Executive Evaporative Check Solenoid Circuit Malfunction