B270C Diagnostic Trouble Code

B270C 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 B270C diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
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.
Some aftermarket accessories and performance modifications

Repair Processes :

If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. 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.

Process Tips

Diagnostic trouble code B270C 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 B270C.

Fortunately, B270C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B270C Trouble Code For Specific Cars

B270C Cadillac Evoq Decklid Release Circuit Open
B270C Mazda Mazda 6 Turbocharger Boost Sensor A Circuit High
B270C Tvr 390 Power Door Lock Circuit Failure
B270C Jensen Cv8 Seat Driver Recline Forward Switch Circuit Open
B270C Skoda Superb Iii Lack Of HO2S21 Switch - Sensor Indicates Rich
B270C Citroen Nemo Fuel Pump Primary Circuit Malfunction
B270C Jaguar 420 Seat Driver Backward Circuit Short To Ground