C144B Diagnostic Trouble Code

C144B is a kind of OBD-II Diagnostic C-Chassis 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 C144B diagnostic trouble code may include:

Possible spark knock (detonation / pre-ignition)
Poor fuel economy
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
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. 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 C144B 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 C144B.

Fortunately, C144B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C144B Trouble Code For Specific Cars

C144B Smart Crossblade Lamp Adaptive Damping Warning Circuit Failure
C144B Leblanc Caroline TCM Communication Circuit
C144B Fafnir 472 Injector Circuit Malfunction - Cylinder 1
C144B Bentley Continental Gt Battery Power Supply ECU Circuit Short To Ground
C144B Dort Roadster Ignition Tamper Circuit Short To Battery
C144B Dodge Caravan Ignition Coil C Primary/Secondary Circuit Malfunction
C144B Lagonda 2-litre Shift Solenoid D Electrical