P1B4F Diagnostic Trouble Code

P1B4F 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 P1B4F diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Faulty IMRC actuator/sensor

Repair Processes :

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. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code P1B4F 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 P1B4F.

Fortunately, P1B4F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1B4F Trouble Code For Specific Cars

P1B4F Brasinca 4200 Convertible Top Up/Down switch Fault
P1B4F Ford Bronco Line Pressure Solenoid System
P1B4F Ghia 450 Oil Change Reset Button Circuit Open
P1B4F Humber Super Right Rear Turn Lamp Circuit Failure
P1B4F Citroen C3 Aircross Front Wiper Select Switch "A" Short to Ground
P1B4F Bricklin Sv Coolant Temperature Circuit Malfunction
P1B4F Lincoln Town Car Throttle/pedal Position Sensor/Switch B Circuit Low Input