B19A2 Diagnostic Trouble Code

B19A2 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 B19A2 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Faulty IMRC actuator/sensor

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code B19A2 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 B19A2.

Fortunately, B19A2 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B19A2 Trouble Code For Specific Cars

B19A2 Fiat Mobi Lamp Turn Signal Left Circuit Short To Battery
B19A2 Paramount Ten Driver Side Crash Sensor Internal Fault
B19A2 Pontiac Solstice Flash To Pass Switch Circuit Short To Battery
B19A2 Pontiac Lemans Fan Control Circuit Malfunction
B19A2 Acura El ABS Hydraulic Pressure Differential Switch Input Short Circuit To Ground
B19A2 Bmw X5 Column Reach Feedback Potentiometer Circuit Short to Battery
B19A2 Alta 1.5-litre Air Bag Passenger Inflator Circuit Resistance Low on Squib