B1793 Diagnostic Trouble Code

B1793 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 B1793 diagnostic trouble code may include:

Possible spark knock (detonation / pre-ignition)
Poor fuel economy
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
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Look at the plug wires to make sure they are not burnt or laying on the exhaust. 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 B1793 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 B1793.

Fortunately, B1793 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1793 Trouble Code For Specific Cars

B1793 Alfa Romeo 8c Accelerometer Rear Circuit Failure
B1793 Gaz Chaika O2 Sensor Circuit Slow Response (Bank 2 Sensor 1)
B1793 Lotus Europa Traction Control Motor Circuit Open
B1793 Fiat Supermirafiori Left Front Center Sensor Circuit Fault
B1793 Alfa Romeo Montreal Air Bag Crash Sensor #1 Ground Circuit Open
B1793 Talbot Sunbeam-lotus Mirror Passenger Right Circuit Open
B1793 Daewoo No 1