B1E40 Diagnostic Trouble Code

B1E40 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 B1E40 diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
Engine surge

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
Dirty air cleaner element Damaged DPF

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code B1E40 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 B1E40.

Fortunately, B1E40 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1E40 Trouble Code For Specific Cars

B1E40 Jac J5 Seat Driver Backward Circuit Failure
B1E40 Bristol 412 Crankshaft Position Camshaft Position Correlation (Bank 2 Sensor B)
B1E40 Holden Lh Power Steering Pressure Sensor Circuit Low Input
B1E40 Toyota Caldina O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)
B1E40 Mazda Rustler 4X4 Switch Out of Self Test Range
B1E40 Toyota Camry O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)
B1E40 Mitsubishi Chariot Audio Remote Climate Control Unit is Not Responding