B1440 Diagnostic Trouble Code

B1440 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 B1440 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
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.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code B1440 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 B1440.

Fortunately, B1440 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1440 Trouble Code For Specific Cars

B1440 Acura Tl ABS Inlet Valve Coil LR Circuit Short To Battery
B1440 Jaguar Xf Seat Driver Front Up Circuit Open
B1440 Revere M HO2S Insufficient Switching Sensor 1
B1440 Skoda Superb I Lack Of HO2S21 Switch - Adaptive Fuel At Limit
B1440 Mosler Mt Camshaft Position Sensor B Circuit Malfunction
B1440 Saab 9-2
B1440 Hudson Hornet Right Front Center Sensor Circuit Failure