B2409 Diagnostic Trouble Code

B2409 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 B2409 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
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)
Some aftermarket accessories and performance modifications

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 B2409 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 B2409.

Fortunately, B2409 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2409 Trouble Code For Specific Cars

B2409 Land Rover Serie I Steering Wheel Angle Sensor Offset Failure
B2409 Allard K2 Air Bag Driver Circuit Open
B2409 Bmw Serie 5 Clutch Position Sensor Circuit Range/Performance Malfunction
B2409 Fiat Talento Left Front Center Sensor Circuit Short to Vbat
B2409 Triumph 2.5-litre Passengers Seat Belt Buckle Switch Circuit Open
B2409 Ford Artic LF PARK LAMP OUTPUT CIRCUIT Short to Battery
B2409 Chrysler Thunderbolt Exhaust Pressure Control Valve High