B3709 Diagnostic Trouble Code

B3709 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 B3709 diagnostic trouble code may include:

Vacuum leak on the engine
Reduction in engine performance, especially at low RPM levels
Engine surge
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
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code B3709 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 B3709.

Fortunately, B3709 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3709 Trouble Code For Specific Cars

B3709 Dodge Intrepid Ignition Cylinder Sensor Battery Short
B3709 Suzuki F1 Metering Oil Pump Position Sensor Circuit Malfunction
B3709 Subaru G3x Justy Left Rear Backup Lamp Circuit Failure
B3709 Maserati Kyalami Transmission Fluid Pressure Sensor/Switch E Circuit Range/Performance
B3709 Alvis Tb Air Pump Circuit Malfunction/ (AIR) System Bank 1
B3709 Toyota Sprinter Passenger Door Ajar Circuit Open
B3709 Benz 27 Boost Calibration Fault