B0803 Diagnostic Trouble Code

B0803 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 B0803 diagnostic trouble code may include:

Carbon Buildup on O2 Sensor
Malfunction Indicator Lamp (MIL) illuminated
Hesitation upon acceleration
Engine surge

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
Some aftermarket accessories and performance modifications

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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 B0803 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 B0803.

Fortunately, B0803 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0803 Trouble Code For Specific Cars

B0803 Steyr 126 Lamp Seat Belt Circuit Failure
B0803 Buick 50 Cylinder 3 Misfire Detected
B0803 Lloyd Alexander Throttle/Pedal Position Sensor/Switch C Circuit Malfunction
B0803 Volkswagen New Beetle Right Rear Sensor Circuit Failure
B0803 Mitsubishi Sst B Camshaft Position - Actuator Circuit (Bank 2)
B0803 Opel Corsa Decklid Release Circuit Open
B0803 Mazda Roadster 4x4 Low Switch Error