B0671 Diagnostic Trouble Code

B0671 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 B0671 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
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
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 :

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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. 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 B0671 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 B0671.

Fortunately, B0671 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0671 Trouble Code For Specific Cars

B0671 Citroen C3 Picasso Front Wiper Select Switch "H" Short to Ground
B0671 Lancia Y STEERING Wheel Angle 1and 2 Circuit Failure
B0671 Volvo P1900 SCP (J1850) Invalid or Missing Data for Engine Systems Other
B0671 Bmw Karmann Clutch Actuator Circuit / Open
B0671 Proton Gen Fuel Sender Circuit Open
B0671 Lotus Elise S2 111s Traction Control Disable Switch Circuit Short to Battery
B0671 Mazda Spiano A/C Compressor Temperature Sensor Malfunction