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 Renault Trafic 3 HO2S Heater Control Circuit High (Bank 2 Sensor 1)
B1122 Ford Consul MAF Sensor In Range But Higher Than Expected
B1122 Mercedes-benz Clc Class Air Pump Circuit Malfunction/ (AIR) System Bank 1
B1122 Kia Sedona Secondary Air Injection System Switching Valve A Circuit Open
B1122 Tata Estate Mirror Passenger Up/Down Motor Stalled
B1122 Toyota 4runner No Communication to VICS Module (No Fitting of VICS)
B1122 Vauxhall 30 Power Window One Touch Up/Down Activated Simultaneously