C0702 Diagnostic Trouble Code

C0702 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 C0702 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. 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. 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 C0702 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 C0702.

Fortunately, C0702 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0702 Trouble Code For Specific Cars

C0702 Marcos Tso Transmission 4-Wheel Drive Low Clutch Relay Circuit To Battery
C0702 Holden Fj Power Door Lock Circuit Failure
C0702 Honda Avancier Pressure Control Solenoid C Control Circuit Range/Performance
C0702 Alfa Romeo Alfetta Accelerometer Sensor Circuit Failure
C0702 Lincoln Premiere Throttle/Pedal Position Sensor/Switch B Circuit High Input
C0702 Infiniti M45
C0702 Smart Crossblade Lamp Adaptive Damping Warning Circuit Failure