B281E Diagnostic Trouble Code

B281E 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 B281E diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor acceleration
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.
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code B281E 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 B281E.

Fortunately, B281E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B281E Trouble Code For Specific Cars

B281E Ford Transit 4 Mirror Switch Reference Voltage Positive Common Supply Voltage Fault
B281E Suzuki Hayabusa Metering Oil Pump Temperature Sensor Circuit Malfunction
B281E Porsche Cayenne Type 9pa
B281E Willys Ace
B281E Honda Domani Pressure Transducer Main / Primary Input Circuit Failure
B281E Bentley Mulsanne Battery Saver Relay Coil Circuit Short To Ground
B281E Vauxhall Vectra Pressure Control Solenoid C Intermittent