B2811 Diagnostic Trouble Code

B2811 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 B2811 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
Hesitation upon acceleration

Possible Causes :

A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Dirty air cleaner element Damaged DPF
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code B2811 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 B2811.

Fortunately, B2811 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2811 Trouble Code For Specific Cars

B2811 Hyundai I10 SCP (J1850) Invalid or Missing Data for Cassette Tape
B2811 Aymesa Gala Aux Heater Start Counter Overrun/System Locked (same as below ?)
B2811 Jaguar Ss Seat Driver Front Down Circuit Short To Battery
B2811 Maserati Gt Transmission Fluid Pressure Sensor/Switch D Circuit Range/Performance
B2811 Pontiac Sunfire Four Wheel Drive (4WD) Switch Circuit
B2811 Bmw X6 Column Reach Feedback Potentiometer Circuit Short to Ground
B2811 Alpine A442 Air Bag Passenger Circuit Resistance Low or Shorted Together