B0772 Diagnostic Trouble Code

B0772 is a kind of OBD-II Diagnostic B-Body 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 B0772 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 :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code B0772 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 B0772.

Fortunately, B0772 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0772 Trouble Code For Specific Cars

B0772 Alfa Romeo Crosswagon Accessory Delay Relay Contact Short To Battery
B0772 Scion Tc Injection Pump Fuel Metering Control "B" Range/Performance (Cam/Rotor/Injector)
B0772 Mazda R
B0772 Abarth 1000 1-2 Shift Malfunction
B0772 Daihatsu Bee Gear Shift Lock Solenoid Circuit / Open
B0772 Kia Opirus Seatbelt Driver Pretensioner Circuit Short to Ground
B0772 Tata Indigo Mirror Passenger Vertical Feedback Potentiometer Circuit Open