B1224 Diagnostic Trouble Code

B1224 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 B1224 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. 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.

Process Tips

Diagnostic trouble code B1224 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 B1224.

Fortunately, B1224 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1224 Trouble Code For Specific Cars

B1224 Delahaye 135 Hydraulic Oil Temperature Sensor Range/Performance
B1224 Zaz Jalta SCP (J1850) Invalid or Missing Data for Vehicle Speed Control
B1224 Lada 2107 Shift Solenoid A Intermittent
B1224 Enzmann 506 Injection Pump Fuel Metering Control "B" Low (Cam/Rotor/Injector)
B1224 Alfa Romeo Montreal Air Bag Crash Sensor #1 Ground Circuit Open
B1224 Holden Caprice Pedal Position Rearward Switch Circuit Short to Battery
B1224 Ford Expedition Memory 1 Switch Circuit Open