B1111 Diagnostic Trouble Code

B1111 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 B1111 diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code B1111 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 B1111.

Fortunately, B1111 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1111 Trouble Code For Specific Cars

B1111 Mercury Mountaineer Air Suspension Rear Height Sensor Low Signal Circuit Short To Ground
B1111 Daimler Db Headlamp Aim Output Relay Circuit Short To Battery
B1111 Alfa Romeo Giulietta AG4 Transmission Torque Modulation Fault
B1111 Mercedes S 420 Air Assist Control Valve Range/Performance
B1111 Bristol 403 Cooling Fan Power/Ground Circuit Malfunction
B1111 Armstrong Siddeley 17 Air Suspension LR Height Sensor Circuit Open
B1111 Tvr T350 Power Sliding Door On/Off Switch Open Circuit