B0633 Diagnostic Trouble Code

B0633 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 B0633 diagnostic trouble code may include:

If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Corroded or damaged connector
Reduction in engine performance, especially at low RPM levels
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

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. 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.

Process Tips

Diagnostic trouble code B0633 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 B0633.

Fortunately, B0633 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0633 Trouble Code For Specific Cars

B0633 Jensen Interceptor Seat Driver Recline Rearward Switch Circuit Failure
B0633 Ferrari 3z Intake Air Temperature Sensor 2 Circuit
B0633 Metrocab Ttt Air Suspension RF Height Sensor Circuit Open
B0633 Ascari Ecosse Air Suspension RF Air Compress Request Exceeded Max Timing
B0633 Amc Matador Air Suspension Gate Solenoid Output Circuit Failure
B0633 Renault Super HO2S Heater Control Circuit (Bank 1 Sensor 1)
B0633 Fiat Grand Break Lamp Tail Output Circuit Short To Battery