C0072 Diagnostic Trouble Code

C0072 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 C0072 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Fuel with a large percentage of sulfur will clog the DPF quickly

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. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code C0072 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 C0072.

Fortunately, C0072 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0072 Trouble Code For Specific Cars

C0072 Subaru Legacy Left Rear Stop lamp Circuit Failure
C0072 Mitsubishi Nessie Aux Blower Sense Switch Circuit Failure
C0072 Kia Rio Iii Secondary Air Injection System Relay B Circuit Malfunction
C0072 Standard V-8 Lamp Keypad Output Open Circuit
C0072 Gaz 210 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
C0072 Nissan Interstar Coast Clutch Solenoid Circuit Malfunction
C0072 Alvis Tb Air Pump Circuit Malfunction/ (AIR) System Bank 1