B23AA Diagnostic Trouble Code

B23AA 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 B23AA 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
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Dirty air cleaner element Damaged DPF
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

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. 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 B23AA 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 B23AA.

Fortunately, B23AA is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B23AA Trouble Code For Specific Cars

B23AA Holden Je Power Steering Output Circuit Malfunction
B23AA Chrysler 300m Engine Oil Temperature Sensor High
B23AA Lola Climax Timing Reference High Resolution Signal B Intermittent/Erratic Pulses
B23AA Chrysler Lhs Evaporative Emission Control System Pressure Sensor Range/Performance
B23AA Volkswagen Eos RF SIDE REPEATER LAMP OUTPUT Ckt Short to Battery
B23AA Porsche 996 Fuel Level Sensor Circuit Range/Performance
B23AA Holden Belmont Pedal Position Forward Switch Circuit Short to Battery