B246B Diagnostic Trouble Code

B246B 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 B246B diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
Lack of power

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Some aftermarket accessories and performance modifications

Repair Processes :

If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. 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 B246B 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 B246B.

Fortunately, B246B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B246B Trouble Code For Specific Cars

B246B Daihatsu Bee Gear Shift Lock Solenoid Circuit / Open
B246B Riley Brooklands Horn Relay Coil Circuit Failure
B246B Tatra T700 Mirror Switch Invalid Code
B246B Daewoo Winstorm Gear Control Malfunction 2,3,5
B246B Austin Allegro Autolamp Sensor Input Circuit Failure
B246B Isuzu Florian
B246B Suzuki Wagon Mirror Driver Up/Down Motor Stalled