P090B Diagnostic Trouble Code

P090B 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 P090B 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 :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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.

Process Tips

Diagnostic trouble code P090B 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 P090B.

Fortunately, P090B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P090B Trouble Code For Specific Cars

P090B Thames 50 Module is Not Responding (Non SCP)
P090B Lancia A112 Speed Wheel RF Comparison Failure
P090B Smart Ultimate Lamp Anti-Theft Indicator Circuit Short To Ground
P090B Morris Fourteen Brake Pedal Switch Circuit Malfunction
P090B Gutbrod Superior Passenger Sid, Side mount Airbag Low resistance on Squib
P090B Mazda Mx-flexa 1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction
P090B Beijing Bj 750 Bank 2 Fuel Control Shifted Lean