B1122 Diagnostic Trouble Code

B1122 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 B1122 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 :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Some aftermarket accessories and performance modifications

Repair Processes :

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. 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 B1122 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 B1122.

Fortunately, B1122 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1122 Trouble Code For Specific Cars

B1122 Nsu Prinz Cylinder 11 Injector Circuit Low
B1122 Emf 30 Injection Pump Fuel Metering Control "A" Range/Performance (Cam/Rotor/Injector)
B1122 Allard Safari Air Bag Driver Inflator Circuit Resistance Low on Squib - Loop #2
B1122 Toyota Estima O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)
B1122 Db Coach HO2S Heater Control Circuit Low (Bank 2 Sensor 1)
B1122 Alfa Romeo Mito Air Bag Crash Sensor #1 Ground Circuit Failure
B1122 Bmw 550 CID High