B3472 Diagnostic Trouble Code

B3472 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 B3472 diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor acceleration
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.
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 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. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.

Process Tips

Diagnostic trouble code B3472 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 B3472.

Fortunately, B3472 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3472 Trouble Code For Specific Cars

B3472 Suzuki Alto Memory 1 Switch Circuit Failure
B3472 Land Rover Lr3 Steering VAPS II Circuit Loop Short To Battery
B3472 Lutzmann Lutzmann Traction Control Valve LF Circuit Open
B3472 Austin Montego Aux A/C Blower Speed 1 Circuit Short to Ground
B3472 Lincoln Blackwood Throttle Position Input Out of Range High
B3472 Holden Hx Power Sliding Detent (Latch) Circuit Failure
B3472 Ferrari 355 Intake Air Temperature Circuit Intermittent