B16A4 Diagnostic Trouble Code

B16A4 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 B16A4 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Faulty IMRC actuator relay (if equipped)

Repair Processes :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code B16A4 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 B16A4.

Fortunately, B16A4 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B16A4 Trouble Code For Specific Cars

B16A4 Abarth Bialbero A/C Clutch Circuit Fault
B16A4 Chevrolet Equinox Drivers Seat Belt Buckle Switch Circuit Short to Ground
B16A4 Zagato Bravo
B16A4 Healey Silverstone Passenger's Front Seat Up Switch Circuit Short to Battery
B16A4 Wolseley 15
B16A4 Cord 8 Fuel Sender Circuit Open
B16A4 Volvo V70 Ii SCP (J1850) Invalid or Missing Data for External Lamp Outage