C144D Diagnostic Trouble Code

C144D 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 C144D diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
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

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
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code C144D 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 C144D.

Fortunately, C144D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C144D Trouble Code For Specific Cars

C144D Mercedes Clk ABS Outlet Valve Coil LF Circuit Short To Battery
C144D Holden Maloo Power Supply #1 Circuit Short to Ground
C144D Hyundai Matrix SCP (J1850) Invalid or Missing Data for Climate Control (HVAC)
C144D Aston Martin V12 Vanquish Air Suspension Warning Lamp Circuit Open
C144D Lifan 620 Throttle Control Unit Modulated Command Malfunction
C144D Abarth Renault Fregate A/C pressure sensor circuit voltage high
C144D Volvo P210