P1B7D Diagnostic Trouble Code

P1B7D 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 P1B7D diagnostic trouble code may include:

Vacuum leak on the engine
Reduction in engine performance, especially at low RPM levels
Engine surge
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.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P1B7D 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 P1B7D.

Fortunately, P1B7D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1B7D Trouble Code For Specific Cars

P1B7D Bertone Blitz Brake Motor Warning lamp Circuit Short to Vbatt
P1B7D Ds Ds 5 Ignition/Distributor Engine Speed Input Circuit Malfunction
P1B7D Ferrari 355 Intake Air Temperature Circuit Intermittent
P1B7D Rolls-royce Legalimit Hydraulic Pump Relay Circuit Failure
P1B7D Smart Cabrio Lamp ABS Warning Output Circuit Open
P1B7D Daihatsu Sonica Glow Plug Circuit Low Input (Bank #2)
P1B7D Holden Belmont Pedal Position Forward Switch Circuit Short to Battery