B2845 Diagnostic Trouble Code

B2845 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 B2845 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
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.
Defective ECU strategies or components will prevent proper regeneration

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. 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.

Process Tips

Diagnostic trouble code B2845 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 B2845.

Fortunately, B2845 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2845 Trouble Code For Specific Cars

B2845 Holden Omega Power Supply Sensor Circuit Open
B2845 Mazda Mazda 5 Turbo/Super Charger Turbine Overspeed
B2845 Subaru Justy Left Rear Sensor Circuit Fault
B2845 Toyota Cynos O2 Sensor Circuit Slow Response (Bank 2 Sensor 2)
B2845 Abarth 800 A Camshaft Position - Timing Over-Retarded (Bank 2)
B2845 Maserati Indy Transmission Fluid Pressure Sensor/Switch E Circuit
B2845 Lanchester 30 Speed Control Unable to Hold Speed