B2687 Diagnostic Trouble Code

B2687 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 B2687 diagnostic trouble code may include:

Vacuum leak on the engine
Reduction in engine performance, especially at low RPM levels
Engine surge
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look at the plug wires to make sure they are not burnt or laying on the exhaust. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code B2687 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 B2687.

Fortunately, B2687 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2687 Trouble Code For Specific Cars

B2687 Land Rover Series I Subsidiary Throttle Valve Solenoid Circuit Malfunction
B2687 Fiat 131 Knock Sensor 2 Circuit Low Input (Bank 2)
B2687 Mercedes E 220 ABS Power Relay Coil Open Circuit
B2687 Maserati Birdcage Transmission Fluid Pressure Sensor/Switch C Circuit
B2687 Seat Salsa Input/Turbine Speed Sensor Circuit Intermittent
B2687 Austin 10 Audio Remote Climate Control Unit is Not Responding
B2687 Toyota Century O2 Sensor Circuit Malfunction (Bank 2 Sensor 2)