B3191 Diagnostic Trouble Code

B3191 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 B3191 diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Dirty air cleaner element Damaged DPF

Repair Processes :

If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code B3191 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 B3191.

Fortunately, B3191 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3191 Trouble Code For Specific Cars

B3191 Chevrolet Zafira Engine Coolant Temperature Circuit Range/Performance Problem
B3191 Audi S4 Audio CD/DJ Thermal Shutdown Fault
B3191 Mikrus Mr ANTI THEFT HORN OUTPUT CIRCUIT Short to Gnd
B3191 Lotus 11 Torque Converter Clutch Circuit Performance or Stuck Off
B3191 Rover 2300 Ignition Coil - Cylinder 1 - Early Activation Fault
B3191 Morris Six Calibration Resistor Out Of Range
B3191 Opel Corsa E Diagnostic Lamp Driver Fault