B3389 Diagnostic Trouble Code

B3389 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 B3389 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

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.
An air leak forward of the DPF will change the sensor readings resulting in the code

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. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code B3389 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 B3389.

Fortunately, B3389 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3389 Trouble Code For Specific Cars

B3389 Siata 1250 Intake Air Temperature Circuit Malfunction
B3389 Hyundai Centennial SBDS Interactive Codes
B3389 Lincoln Sentinel Throttle/Pedal Position Sensor/Switch B Circuit Intermittent
B3389 Bentley 4-litre Battery Power Relay Circuit Failure
B3389 Opel Insignia Dim Panel Increase Input Circuit Short To Ground
B3389 Mitsubishi Pajero Iii Aux Heater Coolant Pump Circuit Open
B3389 Wartburg Estate SCP (J1850) Invalid or Missing Data for Legislated Diagnostics