B2459 Diagnostic Trouble Code

B2459 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 B2459 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Rich or lean exhaust

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.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. 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.

Process Tips

Diagnostic trouble code B2459 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 B2459.

Fortunately, B2459 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2459 Trouble Code For Specific Cars

B2459 Sunbeam 3-litres Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
B2459 Honda Edix Pressure Transducer Main / Primary signal Faulted
B2459 Triumph Scrambler Xe PCM - IDM Communications Error
B2459 Nissan Presage COURTESY LAMP OUTPUT Failure
B2459 Vauxhall Astra Power Window RR Motor Circuit Short To Ground
B2459 Daimler 2.5-litre Gyroscope Error
B2459 Atalanta 1.5-litre Air Temperature External Sensor Circuit Short To Ground