P101B Diagnostic Trouble Code

P101B is a kind of OBD-II Diagnostic P-Powertrain 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 P101B diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
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

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code P101B 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 P101B.

Fortunately, P101B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P101B Trouble Code For Specific Cars

P101B Lada Priora Shift Solenoid B Performance
P101B Acura Tl Iii ABS Inlet Valve Coil LR Circuit Short To Ground
P101B Triumph 1800 Passenger's Front Seat Up Switch Circuit Short to Battery
P101B Austin A99 Autolamp On Circuit Short To Ground
P101B Mercedes C 32 ABS Inlet Valve Coil LR Circuit Short To Battery
P101B Chevrolet Tandem Electronic Throttle Monitor Malfunction
P101B Sunbeam Alpine Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem