B0727 Diagnostic Trouble Code

B0727 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 B0727 diagnostic trouble code may include:

The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Faulty or damaged wiring
Hesitation upon acceleration
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Defective ECU strategies or components will prevent proper regeneration

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 missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code B0727 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 B0727.

Fortunately, B0727 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0727 Trouble Code For Specific Cars

B0727 Ferrari F399 Internal Control Module Keep Alive Memory (KAM) Error
B0727 Bristol 400 Cooling Fan 3 Control Circuit Malfunction
B0727 Gaz 24-10 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)
B0727 Skoda 420 Key Off Voltage Low
B0727 Aro 10 Air Suspension Rear Inflator Solenoid Output Circuit Failure
B0727 Turner 1100 Pedal Position Rearward Switch Circuit Short to Battery
B0727 Fiat 500 Lamp Air Bag Warning Indicator Circuit Open