B1912 Diagnostic Trouble Code

B1912 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 B1912 diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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 B1912 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 B1912.

Fortunately, B1912 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1912 Trouble Code For Specific Cars

B1912 Chrysler Valiant Exhaust Pressure Sensor High
B1912 Hudson Jet Right Front Center Sensor Circuit Short to Vbat
B1912 Vauxhall Tigra Pressure Control Solenoid C Control Circuit Range/Performance
B1912 Ultima Gtr Power Supply Sensor Circuit Open
B1912 Mercury Roadster Air Suspension Rear Pneumatic Failure
B1912 Jaguar D-type Seat Driver Forward Circuit Short To Battery
B1912 Dacia Duster Fuel Temperature Sensor #2 Circuit Short to Ground