B15FE Diagnostic Trouble Code

B15FE 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 B15FE diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
Poor acceleration

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.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector.

Process Tips

Diagnostic trouble code B15FE 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 B15FE.

Fortunately, B15FE is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B15FE Trouble Code For Specific Cars

B15FE Renault Be Bop Gear Shift Foward Actuator Circuit Range/Performance
B15FE Toyota Aygo O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
B15FE Trabant 601 Passenger Sid, Side mount Airbag Circuit Short to Ground
B15FE Mazda Mx-6 1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction
B15FE Chevrolet Aerovette Driveline Disconnect Switch Input Circuit
B15FE Ferrari 156 Injector Control Circuit
B15FE Armstrong Siddeley 17 Air Suspension LR Height Sensor Circuit Open