B0470 Diagnostic Trouble Code

B0470 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 B0470 diagnostic trouble code may include:

Faulty or damaged wiring
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Poor fuel economy
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.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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 B0470 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 B0470.

Fortunately, B0470 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0470 Trouble Code For Specific Cars

B0470 Honda Jazz 1 Pump Speed Signal Fault
B0470 Scripps-booth 22 Hp Injector Circuit Malfunction - Cylinder 1
B0470 Aston Martin Am Vantage Air Suspension RF Height Sensor Circuit Short To Battery
B0470 Volvo 66
B0470 Nissan Quest Crankshaft Position Sensor A Circuit High Input
B0470 Buick Bengal Cylinder 5 Injector Circuit Low
B0470 Steyr Type 200 Lamp Turn Signal Front Output Circuit Failure