B3221 Diagnostic Trouble Code

B3221 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 B3221 diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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.

Process Tips

Diagnostic trouble code B3221 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 B3221.

Fortunately, B3221 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3221 Trouble Code For Specific Cars

B3221 Rinspeed Advantige Hydraulic Oil Temperature Sensor Circuit Intermittent
B3221 Plymouth Breeze Evaporative Emission Control System Malfunction
B3221 Td Cars Td2000 Misfire Detected - Rough Road Data Not Available
B3221 Opel Crossland X Digital TRS Failed to Transition States in KOEO / KOER
B3221 Lada Riva Shift Solenoid B Performance or Stuck Off/2-3 Shift Solenoid Valve Performance
B3221 Sunbeam-talbot Alpine Master Cylinder Pressure Out of Range
B3221 Infiniti J30