B19A5 Diagnostic Trouble Code

B19A5 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 B19A5 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

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 the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. 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 B19A5 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 B19A5.

Fortunately, B19A5 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B19A5 Trouble Code For Specific Cars

B19A5 Mg C-type Air Suspension RR Air Spring/Shock Solenoid Output Circuit Open
B19A5 Volvo V70 Ii SCP (J1850) Invalid or Missing Data for External Lamp Outage
B19A5 Hispano Suiza H6 Pedal Correlation PDS2 and LPDS High
B19A5 Daimler One-o-four Heated Backlite Relay Circuit Failure
B19A5 Honda F1 PRNDL Input #3 Circuit Failure
B19A5 Subaru Alfa Led #1 Circuit Failure
B19A5 Atalanta 2-litre Air Temperature Internal Sensor Circuit Failure