B0557 Diagnostic Trouble Code

B0557 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 B0557 diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon 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.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. 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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code B0557 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 B0557.

Fortunately, B0557 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0557 Trouble Code For Specific Cars

B0557 Du Pont Touring Illuminated Entry Input Open Circuit
B0557 Bugatti Type 57 Cylinder 12 Misfire Detected
B0557 Singer 1.5-litre Internal Control Module RAM Error
B0557 Triumph 10 Passenger Solar Radiation Sensor Circuit Short to Ground
B0557 Honda Lagreat Purge flow Sensor Circuit Intermittent
B0557 Citroen Xantia Fuel Rail Pressure Sensor Circuit Low Input
B0557 Volvo 260 SCP (J1850) Invalid or Missing Data for Displays